Minerals, Electrolytes & Mental Health: Understanding How These Important Nutrients Affect Your Mood, Energy, and Thinking

Introduction

Your body needs minerals and electrolytes to stay healthy. Electrolytes are minerals (like sodium and potassium) that carry an electric charge and help your cells work. These nutrients don’t just keep your body running – they also affect how you feel and think. An imbalance (too little or too much) can sometimes cause mood changes or confusion. This guide explains, in simple terms, how certain key minerals relate to mental health. We’ll cover why each mineral matters for your brain, what happens if levels aren’t right, where to find it in everyday foods, and other important tips. This guide is meant to help patients understand why labs may be ordered, how mineral imbalances can affect mood, anxiety, focus, sleep, and thinking, and why testing first is important before taking supplements.

Understanding Each Mineral

Sodium

Why This Mineral Matters for Mental Health

Sodium is a mineral that helps your body in many important ways. It works like an electrical messenger in your brain and nerves, helping them send signals to each other. Think of it like the electricity that powers your home—without it, things don’t work properly. Sodium helps control mood and emotions by helping brain cells communicate properly. It affects your energy levels—low sodium can make you feel tired and weak. It supports focus and thinking because your brain needs the right amount to work well. It also influences sleep quality and anxiety levels—both too much and too little can affect these. When sodium levels are off-balance, it can affect chemicals in your brain called neurotransmitters (like serotonin and dopamine) that control your mood.

What Is a Normal Level?

Doctors measure sodium through a simple blood test. The normal range is usually 135-145 mmol/L. Your provider will explain what your specific results mean. Every lab has slightly different “normal” ranges, and what’s normal for one person might not be perfect for another. You can’t reliably feel if your sodium is off—symptoms can overlap with many other conditions—so a blood test is the best way to know.

Mental Health Symptoms When Levels Are Too Low

When sodium levels drop too low (a condition called hyponatremia), you might notice:

• Feeling confused or ‘foggy.’
• Trouble remembering things
• Feeling irritable or cranky
• Anxiety or nervousness
• Fatigue and low energy
• Trouble focusing or paying attention
• Mood swings
• In severe cases: hallucinations, seizures, or delirium

Mental Health Symptoms When Levels Are Too High

Too much sodium in your blood (hypernatremia) is less common, but it can cause:

• Restlessness and agitation
• Confusion
• Irritability
• Trouble sleeping
• Increased thirst

Natural Food Sources

Your body needs some sodium every day, but most Americans get too much from processed foods. Healthy sources include:

• Table salt (use in moderation)
• Pickles and olives
• Cheese
• Bread and baked goods
• Canned soups
• Condiments and sauces

Supplements (Important Safety Section)

Most people get more than enough sodium from food and don’t need extra salt. Do NOT take sodium supplements without medical advice. Taking extra sodium when you don’t need it can raise blood pressure and cause heart and kidney problems. Some medications can affect sodium levels. Always talk to your healthcare provider before making big changes to your salt intake.

Important Things Patients Should Know

• Both low and high sodium can cause mental confusion, so staying in balance is important
• Older adults, people on certain medications (like diuretics), and those with kidney, heart, or liver problems are more prone to sodium imbalances.
• If you have symptoms like confusion, severe fatigue, or frequent headaches, your doctor may check your sodium with a blood test.
• Managing sodium is not a substitute for mental health treatment—it’s one piece of the puzzle
• Never feel ashamed if your provider brings up your diet or orders a sodium test—it’s part of caring for you as a whole person

Potassium

Why This Mineral Matters for Mental Health

Potassium is another crucial electrolyte that helps your brain and nerves work. It partners with sodium to maintain the electrical signals in your nervous system. Potassium is especially important for mood regulation and stress. It helps nerves send messages and is needed for muscles (including the heart) to function. In the brain, potassium aids in keeping nerve signals steady and even helps in the production of serotonin, a brain chemical that influences feelings of happiness. Potassium is considered a vital mineral for brain function and mental health, helping to maintain normal nerve transmission. Some research has even shown that diets rich in potassium are linked to a lower risk of depression. Simply put, potassium helps keep your mind and body calm and balanced by regulating how your nerves fire and how your brain manages stress.

What Is a Normal Level?

Potassium levels are measured by a blood test and are part of routine blood work (often called an electrolyte panel). Normal potassium levels are usually 3.5-5.0 mmol/L. Levels outside this range can be dangerous, so your provider will monitor them carefully if they’re abnormal. You cannot reliably feel if your potassium is low or high; symptoms can be vague. So, a blood test is the best way to know.

Mental Health Symptoms When Levels Are Too Low

When potassium is too low (hypokalemia), you could experience:

• Depression and low mood
• Fatigue and weakness (especially in muscles)
• Brain fog and trouble concentrating
• Irritability and mood swings
• Anxiety or feeling stressed
• Confusion
• Trouble sleeping

Mental Health Symptoms When Levels Are Too High

Too much potassium (hyperkalemia) can cause:

• Anxiety and nervousness
• Confusion
• Weakness
• Irregular heartbeat (this is serious and needs immediate medical care)

Natural Food Sources

Potassium is plentiful in many healthy, everyday foods. Some affordable, potassium-rich foods include:

• Fruits: Bananas, avocados, oranges, melons, dried apricots, prunes
• Vegetables: Potatoes (with skin), sweet potatoes, spinach, broccoli, tomatoes
• Beans and legumes: Black beans, lentils, kidney beans
• Nuts and seeds: Almonds, sunflower seeds
• Fish: Salmon, tuna
• Dairy: Milk and yogurt

Supplements (Important Safety Section)

Potassium supplements should only be taken under medical supervision. Too much potassium can be dangerous, especially for your heart. Many medications can raise potassium levels. People with kidney problems must be very careful with potassium. High-dose potassium supplements can cause serious side effects, including dangerous heart rhythms. Do NOT take potassium supplements unless your doctor specifically prescribes them.

Important Things Patients Should Know

• Low or high potassium can only be confirmed with a blood test—don’t self-diagnose.
• People on diuretic medications (water pills) for blood pressure are at higher risk for low potassium.
• Those with kidney disease are most at risk for high potassium.
• Your mental health provider may inquire about your diet or order lab tests because physical health affects mental health.
• Generally, you can maintain proper potassium levels by eating a variety of whole foods.

Chloride

Why This Mineral Matters for Mental Health

Chloride often gets mentioned alongside sodium because together they form table salt (sodium chloride). Chloride is an electrolyte that helps maintain the right fluid balance in and around your cells and also plays a role in keeping your body’s pH (acid-base level) stable. While we don’t usually talk about “chloride and mood” in everyday terms, chloride is crucial for overall brain function indirectly. It helps keep the amount of fluid in your blood and tissues just right, which ensures that your brain cells are not dehydrated or swollen. Chloride also helps make stomach acid, which is important for digestion, and poor digestion can affect how you feel. Most importantly for mental function, chloride works with other electrolytes to keep the electrical activity of the brain stable. In simple terms, chloride matters because it’s a partner to sodium—where sodium goes, chloride goes. And together they ensure that your brain’s environment is balanced.

What Is a Normal Level?

Like other electrolytes, chloride is checked via a blood test. It’s typically part of the “basic metabolic panel” that your provider might order. Normal chloride levels are usually 96-106 mmol/L. Often, chloride changes go hand-in-hand with changes in other values like sodium or bicarbonate. Your doctor will interpret it along with other electrolytes.

Mental Health Symptoms When Levels Are Too Low

Low chloride (hypochloremia) can cause:

• Confusion and difficulty concentrating
• Fatigue and weakness
• Irritability
• Mood changes
• Trouble thinking clearly

Mental Health Symptoms When Levels Are Too High

High chloride levels (hyperchloremia) may cause:

• Confusion
• Weakness
• Difficulty breathing
• Changes in mental alertness

Natural Food Sources

Chloride is found naturally in many foods, usually coupled with sodium:

• Table salt (sodium chloride)—the most common source
• Seaweed and sea vegetables
• Tomatoes
• Lettuce and celery
• Olives
• Rye bread

Supplements (Important Safety Section)

You do NOT need chloride supplements. Most people get enough chloride from salt in their diet. Regular table salt provides all the chloride most people need. Chloride supplements are rarely necessary and could be harmful. Taking extra chloride can affect your body’s acid-base balance. Always consult your provider before taking any supplement containing chloride.

Important Things Patients Should Know

• Chloride levels usually change along with sodium levels—they work together
• Vomiting can cause low chloride levels; dehydration affects chloride balance
• Blood tests are the best way to check chloride levels
• Chloride imbalances are often part of broader electrolyte problems that need medical attention
• A balanced intake of salt (not too much, not too little) will ensure proper chloride levels.

Carbon Dioxide (Bicarbonate)

Why This Mineral Matters for Mental Health

Carbon dioxide (CO2) and bicarbonate help keep your blood at the right pH (acid-base balance). Your brain is very sensitive to changes in pH, and this balance is crucial for proper brain function. Bicarbonate affects anxiety levels—CO2 sensitivity is linked to panic and anxiety. It influences brain pH, which affects how brain cells work. It’s connected to how you breathe during anxiety. It helps maintain mental clarity—pH changes can cause confusion or brain fog. Interestingly, breathing too fast (hyperventilation) during anxiety can change CO2 levels, which can make anxiety worse. Bicarbonate basically acts like your body’s natural antacid, keeping things in the “Goldilocks zone” (not too acidic, not too basic). This stable environment is important for brain cells to work properly.

What Is a Normal Level?

Normal bicarbonate levels are usually 22-28 mmol/L. This is measured as part of a basic metabolic panel or blood gas test. Your provider will tell you if it’s within the normal range. Bicarbonate is usually stable unless you have a health issue that disturbs acid-base balance (like lung problems, kidney problems, uncontrolled diabetes, or severe vomiting).

Mental Health Symptoms When Levels Are Too Low

Low bicarbonate (acidosis) can cause:

• Confusion and disorientation
• Fatigue
• Rapid breathing
• Headaches
• Difficulty concentrating
• Drowsiness

Mental Health Symptoms When Levels Are Too High

High bicarbonate (alkalosis) can cause:

• Anxiety and agitation
• Confusion
• Hand tremors
• Muscle twitching
• Lightheadedness and dizziness
• Irritability

Natural Food Sources

Bicarbonate is produced naturally by your body. You don’t need to eat specific foods to get it. However, eating a balanced diet helps your body maintain proper acid-base balance:

• Fruits and vegetables (especially leafy greens)
• Whole grains
• Lean proteins
• Adequate water intake

Supplements (Important Safety Section)

Do NOT take bicarbonate (baking soda) supplements for mental health without medical supervision. Your body carefully controls bicarbonate levels. Taking baking soda can disrupt this balance. It can interact with many medications. It can cause serious side effects if used incorrectly. Only take bicarbonate supplements if prescribed by your doctor for a specific medical condition.

Important Things Patients Should Know

• Anxiety and panic attacks can temporarily change CO2 and pH levels through hyperventilation
• Learning proper breathing techniques can help manage anxiety-related symptoms
• Chronic breathing problems or lung disease can affect CO2 levels
• Kidney problems can affect bicarbonate balance
• People with kidney problems, lung diseases, or uncontrolled diabetes might experience bicarbonate imbalances more often

Magnesium

Why This Mineral Matters for Mental Health

Magnesium is sometimes called the “anti-stress” or “relaxation” mineral. It’s involved in over 300 processes in your body, including many that affect your brain and nervous system. Magnesium helps regulate neurotransmitters—these are the chemicals that nerves use to send signals. It influences serotonin (which affects mood) and GABA (which helps calm the brain). It also helps control the release of stress hormones like cortisol. In simpler terms, magnesium acts as a brake pedal for your nervous system when things are revving too high. If you’re under stress, adequate magnesium can help prevent feelings of anxiety by blocking excessive nerve signaling and promoting calmness. Research suggests that magnesium plays a role in mood regulation and the body’s stress response, and that correcting a true deficiency may help reduce symptoms of low mood and anxiety in some people.

What Is a Normal Level?

Normal magnesium levels are usually 1.7-2.2 mg/dL, depending on the lab. Important: Blood tests may not always show magnesium deficiency because most magnesium is stored inside cells, not in the blood. Healthcare providers also pay attention to symptoms. If you have signs of low magnesium (like muscle cramps, tremors, or high stress levels and poor sleep) but your blood magnesium is borderline, a provider might still recommend increasing intake.

Mental Health Symptoms When Levels Are Too Low

Low magnesium (hypomagnesemia) can show up in various ways:

• Depression and low mood
• Anxiety and panic attacks
• Irritability and mood swings
• Trouble sleeping or insomnia
• Brain fog and difficulty concentrating
• Feeling overwhelmed by stress
• Fatigue and low energy
• Restlessness and agitation

Mental Health Symptoms When Levels Are Too High

High magnesium (from supplements) can cause:

• Drowsiness
• Confusion
• Muscle weakness
• Slowed breathing
• Irregular heartbeat

Natural Food Sources

Magnesium is abundant in many common foods, especially plant-based foods:

• Nuts and seeds: Pumpkin seeds, almonds, cashews, sunflower seeds
• Leafy greens: Spinach, kale, Swiss chard
• Whole grains: Brown rice, quinoa, oatmeal, whole wheat bread
• Beans and legumes: Black beans, chickpeas, lentils
• Fish: Salmon, mackerel
• Dark chocolate: A tasty source in moderation
• Avocados and bananas

Supplements (Important Safety Section)

Magnesium supplements can be helpful, but talk to your provider first. Benefits: May help with depression and anxiety symptoms when you’re deficient; generally safe when taken at appropriate doses. Safety warnings: Can cause diarrhea and stomach upset; can interact with many medications; people with kidney disease should not take magnesium supplements without medical supervision. Dose: Your provider will recommend an amount based on your situation, your diet, and any other medications you take.

Important Things Patients Should Know

• Chronic stress depletes magnesium from your body—there’s a vicious circle between stress and magnesium
• Many common medications can lower magnesium levels, including diuretics and proton pump inhibitors (PPIs) for heartburn
• Many people don’t get enough magnesium from diet alone—some estimates say 50-70% have suboptimal intake
• Food is usually the best and safest source of magnesium
• If you’re deficient, it may take several weeks of supplementation to restore normal levels

Calcium

Why This Mineral Matters for Mental Health

Most people know calcium is important for bones, but it’s also essential for brain function. Calcium acts like a messenger in your brain, helping nerve cells communicate with each other. When a nerve wants to “fire” and send a message, calcium ions rush into the nerve ending and help release neurotransmitters (the chemicals that carry messages to the next nerve). Because of this, calcium is essential for normal brain communication. Calcium is needed to make and release mood chemicals like serotonin and dopamine. Low levels can increase nervousness and panic. It helps make melatonin for good sleep. It acts as an on/off switch for nerve cells. It helps regulate mood and prevent mood swings. Research shows that calcium signaling in the brain is disrupted in depression and bipolar disorder.

What Is a Normal Level?

Normal blood calcium is tightly regulated by your body. The typical range for adults is around 8.5 to 10.5 mg/dL. Your body works hard to keep it normal; it will even pull calcium from your bones if needed to keep blood levels steady. Testing calcium is common in routine bloodwork; if your mental health provider orders labs, calcium might be included.

Mental Health Symptoms When Levels Are Too Low

Low calcium (hypocalcemia) can significantly affect how you feel:

• Anxiety and panic attacks
• Depression
• Brain fog and trouble concentrating
• Irritability and mood swings
• Confusion
• Sleep problems
• Increased stress response

Mental Health Symptoms When Levels Are Too High

High calcium (hypercalcemia) can cause:

• Confusion and disorientation
• Depression
• Fatigue and weakness
• Memory problems
• Difficulty concentrating

Natural Food Sources

Great sources of calcium include:

• Dairy products: Milk, yogurt, cheese (provide about 300 mg per cup)
• Fortified plant milks: Soy milk, almond milk, oat milk
• Leafy greens: Kale, collard greens, bok choy
• Fish with bones: Canned sardines and salmon
• Tofu (made with calcium sulfate)
• Fortified foods: Orange juice, cereals
• Seeds: Chia seeds, sesame seeds

Supplements (Important Safety Section)

Calcium supplements can be helpful for some people, but they’re not risk-free. Benefits: Can help if you can’t get enough from food; important for people who avoid dairy. Safety warnings: High doses may increase the risk of heart problems; can cause constipation; too much calcium can interfere with the absorption of other minerals. Important research finding: Studies show that calcium from food is safer than calcium from supplements. Getting calcium from food is generally safer and better than supplements.

Important Things Patients Should Know

• Vitamin D is needed to absorb calcium properly
• Calcium and magnesium work together in the body
• Too much calcium can lower magnesium levels
• Some people need more calcium (pregnant women, older adults, people who avoid dairy)
• Calcium levels are controlled by hormones—sometimes mental health symptoms can be the first clue to a hormonal issue

Zinc

Why This Mineral Matters for Mental Health

Zinc is essential for brain health and mental well-being. It’s highly concentrated in the brain and plays many important roles in how your brain works. Zinc is involved in making neurotransmitters (like serotonin and dopamine), which are critical for regulating mood and emotions. It also helps protect the brain from oxidative stress. Research has shown that zinc plays a role in the area of the brain linked to emotional control (like the hippocampus and amygdala). Notably, zinc deficiency has been linked to depression and anxiety. Many studies find that people with depression often have lower zinc levels than those without. Zinc is thought to support Brain-Derived Neurotrophic Factor (BDNF), which is crucial for brain cell growth and resilience—low BDNF has been associated with depression.

What Is a Normal Level?

Zinc isn’t usually part of routine blood tests unless specifically requested. Normal ranges vary by lab, but blood tests can help identify a deficiency. Note: Like magnesium, blood tests may not always show the full picture of zinc status. Signs that might prompt a doctor to test zinc include unexplained loss of appetite, certain kinds of skin rash, poor wound healing, or suspicion of malnutrition.

Mental Health Symptoms When Levels Are Too Low

Low zinc can contribute to:

• Depression and sadness
• Anxiety and nervousness
• Brain fog and trouble thinking clearly
• Poor memory
• Low motivation and energy
• Difficulty learning new things
• Increased stress sensitivity

Mental Health Symptoms When Levels Are Too High

Too much zinc (usually from supplements) can cause:

• Nausea and vomiting
• Headaches
• Stomach cramps and diarrhea
• Dizziness
• Important: High zinc can cause copper deficiency, leading to nervous system problems

Natural Food Sources

Excellent sources of zinc include:

• Shellfish: Oysters (the highest source), crab, lobster
• Meat: Beef, pork, chicken, turkey
• Beans and legumes: Chickpeas, lentils, black beans
• Nuts and seeds: Pumpkin seeds, cashews, almonds
• Dairy: Milk, cheese, yogurt
• Whole grains: Oats, quinoa, brown rice
• Eggs

Supplements (Important Safety Section)

Zinc supplements should be taken with caution and medical guidance. Benefits when deficient: May improve depression symptoms; supports immune function. Safety warnings: Too much zinc interferes with copper absorption and can be toxic; it can interact with antibiotics and other medications. Dose: Zinc has a relatively narrow safe range. Your provider will recommend an amount if testing shows you need supplementation.

Important Things Patients Should Know

• Vegetarians and vegans may be at higher risk for zinc deficiency
• Zinc absorption can be reduced by phytates in grains and beans
• Alcohol use can affect zinc levels
• Digestive problems can impair zinc absorption
• Stress and illness can increase zinc needs
• Getting zinc from food is generally safer than high-dose supplements

Phosphorus

Why This Mineral Matters for Mental Health

Phosphorus is essential for making energy in every cell of your body, including your brain cells. It’s a key part of ATP, which is like fuel for your cells. Without enough phosphorus, cells can’t efficiently produce energy, and you might feel fatigued, or your brain might feel sluggish. Phosphorus is also part of phospholipids, which make up the membranes of your brain cells. These cellular membranes need phospholipids to maintain their structure and to send signals. Extreme disruptions in phosphorus levels often come with mental status changes: severe low phosphate can cause confusion, irritability, even seizures, while severe high phosphate (often tied to low calcium) can similarly affect the brain.

What Is a Normal Level?

Normal phosphorus levels are usually 2.5-4.5 mg/dL. Your provider will check this as part of routine blood work or if there’s a specific concern. Most individuals with a balanced diet will have normal phosphate levels. If your diet is very poor or you have a condition like alcoholism or uncontrolled diabetes, phosphate levels might go low. If you have kidney disease, phosphate often goes high.

Mental Health Symptoms When Levels Are Too Low

Low phosphorus (hypophosphatemia) can cause:

• Confusion and altered mental state
• Irritability
• Brain fog and trouble thinking
• Severe weakness and fatigue
• Numbness and tingling
• In severe cases: seizures

Mental Health Symptoms When Levels Are Too High

High phosphorus levels can cause:

• Confusion
• Anxiety
• Difficulty concentrating
• Muscle cramps and numbness (related to low calcium it causes it)

Natural Food Sources

Many protein-rich foods contain phosphorus:

• Dairy products: Milk, yogurt, cheese
• Meat and poultry: Chicken, beef, pork
• Fish and seafood: Salmon, tuna
• Eggs
• Nuts and seeds: Sunflower seeds, pumpkin seeds
• Beans and lentils: Chickpeas, lentils, soybeans
• Whole grains: Oats, brown rice, quinoa

Supplements (Important Safety Section)

Phosphorus supplements are rarely needed and should only be taken with medical supervision. Most people get plenty of phosphorus from food. Too much phosphorus can harm your kidneys and bones. It can interfere with calcium absorption. People with kidney disease must avoid extra phosphorus. Do NOT take phosphorus supplements unless specifically prescribed by your doctor.

Important Things Patients Should Know

• Phosphorus is usually not on your radar—and that’s okay. Most people get sufficient phosphorus without thinking about it
• Severe deficiency is rare but can occur with malnutrition, certain medications, or medical conditions
• People with eating disorders may be at risk during refeeding
• Vitamin D helps your body absorb phosphorus
• The calcium-phosphorus balance is important—they work like a see-saw

Copper

Why This Mineral Matters for Mental Health

Copper is a trace mineral that plays a unique role in the brain. It is a cofactor for several enzymes involved in neurotransmitter synthesis and brain signaling. Copper helps make brain chemicals like dopamine and norepinephrine. It’s crucial for enzymes that act as antioxidants in the brain, protecting neurons from damage. It contributes to the formation of the myelin sheath (the protective coating on nerves), which is essential for quick and efficient signal transmission. Important: Both too little AND too much copper can cause mental health problems. Copper also interacts with the stress response and is needed for making endorphins (feel-good chemicals).

What Is a Normal Level?

Copper is typically measured via blood (serum copper) or indirectly via ceruloplasmin (a copper-carrying protein) levels. Doctors don’t commonly check copper unless there’s a suspicion of an issue. Copper levels can be influenced by inflammation and hormones (women on oral contraceptives or pregnant often have higher copper levels).

Mental Health Symptoms When Levels Are Too Low

Low copper can cause:

• Depression and low mood
• Fatigue and lack of energy
• Trouble thinking and memory problems
• Decreased motivation and apathy
• Panic attacks
• Nervousness and irritability

Mental Health Symptoms When Levels Are Too High

Too much copper can cause:

• Anxiety and agitation
• Irritability and mood swings
• Brain fog and concentration problems
• Depression
• Restlessness
• In extreme cases: personality changes, paranoia, or psychosis

Natural Food Sources

Good sources of copper include:

• Shellfish: Oysters, crab
• Nuts and seeds: Cashews, sunflower seeds
• Beans and legumes: Chickpeas, lentils
• Whole grains: Quinoa, whole wheat
• Dark chocolate
• Organ meats: Liver (very high in copper)
• Mushrooms and leafy greens

Supplements (Important Safety Section)

Copper supplements should only be taken with medical guidance. Important warnings: Most people get enough copper from food. Taking high-dose zinc supplements can cause copper deficiency. Too much copper can be toxic and worsen mental health symptoms. Do NOT take copper supplements unless your healthcare provider has diagnosed a deficiency.

Important Things Patients Should Know

• Copper and zinc balance is important—too much of one can lower the other
• High estrogen levels (birth control pills, pregnancy) can raise copper levels
• Wilson’s disease is a rare condition where copper builds up in the body, often first showing psychiatric symptoms
• Blood tests can check both copper levels and the copper/zinc ratio
• If you have unexplained persistent anxiety or agitation with physical signs like a slight tremor, checking copper might be helpful

Selenium

Why This Mineral Matters for Mental Health

Selenium is a powerful antioxidant mineral that protects your brain from damage. It’s essential for making certain proteins that help regulate mood. Selenium supports thyroid hormone production—thyroid hormones are crucial for brain development and mood regulation. It helps reduce inflammation linked to depression. It may help reduce anxiety. It’s involved in immune function. Interestingly, selenium has an “optimal range”—both too little AND too much can cause problems. Some studies found that regions with selenium-poor soil had more reports of depressed mood and anxiety. In some trials, selenium supplementation improved mood in those with low baseline intake.

What Is a Normal Level?

Selenium levels can be measured in blood, but testing is not routine unless there’s a specific concern. Selenium has a narrow safe range — your provider can interpret levels in context. There’s a tolerable upper limit set by health authorities to avoid toxicity, and exceeding it can cause real harm.

Mental Health Symptoms When Levels Are Too Low

Low selenium can cause:

• Depressed mood
• Anxiety
• Low energy and fatigue
• Brain fog
• Increased stress sensitivity

Mental Health Symptoms When Levels Are Too High

Too much selenium (selenosis) can cause:

• Fatigue
• Irritability
• Depression
• Confusion
• Nausea
• Hair loss
• Garlic breath odor
• Nerve problems

Natural Food Sources

The best sources of selenium include:

• Brazil nuts: The highest source—just 1-2 nuts per day can meet your needs!
• Seafood: Tuna, halibut, sardines
• Fish: Salmon, cod
• Meat: Chicken, turkey, beef
• Eggs
• Whole grains: Brown rice, oats
• Beans and lentils

Supplements (Important Safety Section)

Selenium supplements should be used carefully—there’s a narrow safe range. Benefits when deficient: May improve mood; supports thyroid function. Safety warnings: Too much selenium is toxic; the safe range is narrow, and excess can build up over time; Brazil nuts alone can push intake too high if you eat several daily. Talk to your healthcare provider before taking selenium supplements. Brazil nuts may be a safer way to increase selenium intake naturally.

Important Things Patients Should Know

• There’s an ‘optimal range’—both deficiency and excess can affect mental health
• Soil selenium content varies by region, affecting food selenium levels
• Vegetarians and vegans may have lower selenium intake
• Thyroid problems can be related to selenium status
• Just 1-2 Brazil nuts per day can meet selenium needs, but more than that may be too much

Why Your Mental Health Provider May Order Labs

When you see a mental health provider for symptoms like depression, anxiety, trouble sleeping, or difficulty concentrating, they want to give you the best care possible. Part of that means making sure your symptoms aren’t being caused—or made worse—by a physical health problem. Blood tests that check mineral and electrolyte levels help your provider in several important ways:

• **Rule out medical causes:**Sometimes what looks like depression or anxiety is actually caused by an imbalance in your body. Finding and fixing these imbalances can dramatically improve how you feel.
• **Understand the full picture:**Mental and physical health are connected. Your brain needs proper nutrition and balanced minerals to work well. Lab results give your provider important information to personalize your treatment.
• **Check for medication effects:**Many medications can affect mineral levels. Some psychiatric medications need monitoring. Your provider can adjust treatment if needed.
• **Provide whole-person care:**Good mental health care looks at your entire well-being. Addressing mineral imbalances is part of comprehensive treatment that often leads to better outcomes.

What to Expect

Before the test, your provider will order specific blood tests based on your symptoms. You may need to fast for some tests—your provider will tell you. Let your provider know about all medications and supplements you take. During the test, a small amount of blood will be drawn from your arm. The process usually takes just a few minutes. Results typically come back within a few days. After the test, your provider will explain your results in plain language. If levels are abnormal, they’ll create a plan to address them. This might include dietary changes, supplements (when appropriate), or treating an underlying condition.

Patient Take-Home Messages

Your Mental and Physical Health Are Connected

Your brain is part of your body, and it needs proper nutrition to work well. Just like your heart needs certain nutrients to beat properly, your brain needs minerals and electrolytes to regulate mood, manage stress, and think clearly. Mental health symptoms can sometimes be caused or worsened by mineral imbalances. When these imbalances are identified and corrected, many people feel significantly better.

Labs Help Personalize Your Care

No two people are exactly alike. What works for one person may not work for another. Blood tests help your provider understand your unique body chemistry, create a treatment plan tailored to you, track how well treatments are working, and catch potential problems early. This personalized approach often leads to better results and helps you feel better faster.

Never Self-Diagnose or Self-Treat

This is one of the most important messages in this guide:

• Don’t assume you’re deficient based on symptoms alone—many conditions cause similar symptoms.
• Don’t start taking supplements without medical advice—more is not always better.
• Don’t stop prescribed medications on your own—always talk to your provider first
• Do talk to your healthcare provider if you have symptoms of depression, anxiety, or other mental health concerns.

Food First, Supplements Second

In most cases, getting minerals from food is safer (it’s hard to overdose from food), more effective (nutrients in food work together), better absorbed (your body knows how to use food), and more enjoyable (eating well supports overall health). Supplements have a place, but they should be used thoughtfully, with professional guidance, and only when truly needed.

You’re Not Alone

Many people experience mental health symptoms related to mineral imbalances. It’s not your fault, and it’s more common than you might think. The good news is that these imbalances can often be identified through simple blood tests, many can be corrected with dietary changes or supervised supplementation, addressing mineral imbalances can significantly improve mental health, and you have a healthcare team ready to support you.

Questions to Ask Your Provider

Use this list during your appointments:

• Should I have my mineral and electrolyte levels checked?
• What do my lab results mean for my mental health?
• Are any of my medications affecting my mineral levels?
• Should I make any changes to my diet?
• Would supplements be helpful for me? If so, which ones and what dose?
• How long before I might see improvement?
• When should we recheck my levels?
• Are there any warning signs I should watch for?

Important Safety Reminders

**This guide is for education only—it is not medical advice.**Always consult your healthcare provider before:

• Taking any new supplement
• Changing your diet dramatically
• Stopping any medication
• Making major health decisions

Seek immediate medical care if you experience:

• Chest pain or irregular heartbeat
• Severe confusion or loss of consciousness
• Seizures
• Difficulty breathing
• Severe muscle weakness

This guide was created to help you understand the important connection between minerals and mental health. Knowledge is power—use this information to have better conversations with your healthcare team and take an active role in your wellness journey.

Your mental health matters. Your physical health matters. They’re connected, and addressing both is the path to feeling your best.

If you or someone you know is in crisis

• Call 911 or go to your nearest emergency room for any life-threatening emergency.
• 988 Suicide & Crisis Lifeline — call or text 988, available 24/7. En español: marque 988 y oprima 2. Veterans: 988 y oprima 1, or text 838255.
• Crisis Text Line — text HOME to 741741.
• The Trevor Project (crisis support for LGBTQ+ young people) — call 1-866-488-7386, or text START to 678-678.
• Riverside County — 24/7 crisis line 951-686-HELP (4357); CARES line 800-499-3008.
• San Bernardino County — DBH Screening/Referral 800-968-2636; DBH ACCESS 888-743-1478 (24/7); Mobile Crisis/CCRT 800-398-0018; crisis text 909-420-0560. Arrowhead Regional Medical Center (ARMC) has a dedicated adolescent psychiatric ER (ages 13–17).
• NP Fady (non-emergency) — for routine scheduling or questions, call (909) 707-6261. This line is not monitored for emergencies.