Common Nutrient Deficiencies That May Affect Your Mental Well-Being

Nutrient deficiencies and mental health are closely linked. Low levels of iron, vitamin B12, vitamin D, folate, magnesium or omega-3 fatty acids may contribute to tiredness, poor focus, irritability and low mood. A deficiency is rarely the only cause of how you feel, but it is common, simple to test for and usually treatable.

Many people who constantly feel low or mentally foggy assume the problem lies in their mindset, their motivation, or their mental health. Others worry it is linked to a chronic illness. Sometimes that’s the case, but not always.

Your body may be low on a few basic nutrients, and that can affect both your mental and physical health. Tiredness, poor focus, irritability, and low mood are some of the ways it shows up.

Let’s look at which nutrient deficiencies are most commonly linked to this, and how to tell if one might be affecting you.

Nutrient Deficiencies and Mental Health: Why Food and Mood are Connected

Our brain is a physical organ that builds mood-regulating chemicals like serotonin and dopamine from raw materials in your diet, and it needs a steady supply of oxygen and energy to work well.

This does not mean a deficiency is the only cause of depression or anxiety. Genetics, stress, sleep, and life events all play a part. A nutrient gap is one possible contributor, and one of the easier ones to test for.

Also Read: Mental Health: Signs and Factors Affecting It

Common Nutrient Deficiencies Linked to Low Mood and Poor Focus

The nutrients most often linked to tiredness, poor focus and low mood are iron, vitamin B12, vitamin D, folate, magnesium and omega-3 fatty acids. Here is how each one may affect you.

• Iron Deficiency

Iron helps your red blood cells carry oxygen to your brain and other parts of your body. When iron levels drop, you may feel exhausted, breathless or find it harder to concentrate. Women with heavy periods, pregnant women, teenagers and vegetarians are more likely to develop iron deficiency.

Also note that you can have low iron stores before you become anaemic. Your haemoglobin levels might still be within the normal range while ferritin (a protein that reflects your body’s stored iron) is already low. That is why checking haemoglobin alone may not be enough to identify iron deficiency.

What should you do? 

If you experience constant fatigue, breathlessness or difficulty concentrating, speak to your internal medicine doctor about whether you need a complete blood count (CBC) and ferritin test. If iron deficiency is confirmed, your doctor can recommend dietary changes or iron supplements, depending on how low your levels are and what is causing the deficiency. Do not take iron supplements without medical advice.

Also Read: Iron-Rich Foods to Add to Your Diet

• Vitamin B12 Deficiency

Ever had days when you feel unusually tired, struggle to concentrate or keep forgetting little things? Sometimes, low vitamin B12 levels could be one reason.

Vitamin B12 helps keep your nerves healthy and supports brain function. A deficiency can cause fatigue, forgetfulness, poor concentration, low mood and tingling in your hands or feet. People who follow a vegetarian or vegan diet and don’t eat enough dairy, eggs or B12-fortified foods are at higher risk. Older adults and people taking certain medicines for a long time (such as metformin for diabetes or acid-reducing tablets) are also more likely to develop a deficiency.

B12 deficiency can develop gradually over several years, so its symptoms may go unnoticed or be mistaken for stress, ageing or everyday tiredness. A simple serum vitamin B12 blood test can help confirm it.

1. Vitamin D Deficiency

Despite plenty of sunshine, vitamin D deficiency is very common in India, especially among people who work indoors, cover most of their skin outdoors, or have darker skin. Low levels have been associated with low mood, body aches, and tiredness. A 25-hydroxy vitamin D blood test shows your level. Treating a confirmed deficiency is important, but taking extra vitamin D when your levels are normal is unlikely to improve your health.

Also Read: Osteomalacia: Causes, Symptoms and Treatment

• Folate (vitamin B9) Deficiency

Folate is another B vitamin your body needs to function well. It works alongside vitamin B12 and helps your body make healthy red blood cells and chemicals involved in brain function. Low levels can contribute to fatigue, irritability and poor concentration. Leafy greens, lentils and beans are good food sources. If you are pregnant or planning a pregnancy, your doctor may also advise a folic acid supplement.

• Magnesium Deficiency

Magnesium helps regulate the nervous system and stress response. Low levels may contribute to restlessness, poor sleep, muscle cramps, and a feeling of being “wired but tired.” Blood tests don’t always reflect your true magnesium status, so doctors often rely on symptoms, diet, and medical history together. Nuts, seeds, whole grains and leafy greens are good food sources.

• Low Omega-3 fatty acids

Your brain needs healthy fats to function well, and omega-3s are an important part of this. They are found in foods such as fatty fish, walnuts and flaxseeds. Low dietary intake has been connected with low mood, but the benefits of omega-3 supplements for mental health are still being studied.

Nutrient Deficiencies at a Glance: Signs, Tests and Food Sources

Other nutrients, such as zinc and vitamin B6, are also being studied for their role in mood, but the evidence is still limited.

Also Read: Flax Seeds: Uses, Benefits and Side Effects

Are You Making These Supplement Mistakes?

The safest way to correct a deficiency is to test first and take supplements only on medical advice. Watch out for these common mistakes.

Self-prescribing supplements: Excess intake of vitamin B6, iron or vitamin D can harm your health.

• Assuming every symptom means a deficiency: Fatigue and poor focus can have many other causes.

• Depending only on supplements: They cannot replace professional mental health care when needed.
• Stopping too soon: Some deficiencies take weeks or months to correct. Complete the advised course.

Feeling low or tired is not always due to a nutrient deficiency. But if you are eating well and still not feeling right, get it checked by a doctor, as absorption issues, pregnancy, or certain medicines can affect your levels.

Also Read: Tips for Good Mental Health

Who Is More Likely to Have a Nutrient Deficiency?

Anyone can become low on a nutrient, but you may be at higher risk if you:

• Follow a vegetarian or vegan diet
• Are pregnant or breastfeeding
• Have heavy periods
• Are an older adult
• Have a gut condition such as coeliac disease or inflammatory bowel disease, or have had weight-loss surgery
• Take certain medicines long term, such as metformin or acid-reducing tablets
• Spend most of your day indoors

What To Do Next If You Suspect a Deficiency

• Note your symptoms, how long they have lasted, and any recent changes in diet, medication, periods, or sleep.
• Notice what you eat. Are leafy greens, pulses, eggs, dairy, nuts, or fish a regular part of your meals? If you are vegetarian or vegan, plan for B12 intake after consulting your dietician or doctor.
• Get tested first. A simple blood test can check haemoglobin, ferritin, B12, vitamin D, and often folate. Talk to a doctor before taking any supplements.
• Finish the course. Stick to the dose and duration your doctor advises, and retest if they suggest it.
• If low mood comes with hopelessness, loss of interest in daily life, or thoughts of self-harm, see a doctor or mental health professional without any delay. If you or someone you know is in crisis, call Tele-MANAS on 14416 (free, 24×7) or dial 112 for emergency help.

Also Read: How to Reduce Mental Stress

To Sum Up

If you have been feeling tired, foggy, or low for more than two weeks, it is time to get checked. The same goes if you are also noticing hair fall, tingling in your hands or feet, pale skin, frequent illness, or unusual cramps.

A general physician or internal medicine doctor can start with a few basic tests and, if needed, refer you to a specialist or mental health professional.

At the CK Birla Hospital, our doctors look at both your physical and emotional health, so you don’t have to figure it out alone. Call us to book a consultation.