How Do You Know if You Are Lacking Vitamins?

October 28, 2025

2 min read

The right lab test can help you start taking vitamins. Before you get tested, first take a closer look at which vitamins or minerals you might lack. Find out how various vitamins deficiency shows itself.

Key takeaways

The right lab test can help you start taking vitamins.

Who this is for

People exploring Vitamins and minerals through vitamins, сheckup.

Why it matters

This piece helps you get oriented quickly, then move into a collection or series if you want to keep going.

Article author

Dr. Helga

General practitioner

Vitamins are one of the only substances that we can get externally, as they are not synthesized by our bodies. Even if you have the best possible diet, it is virtually impossible to get all the needed vitamins from food alone. A chronic deficiency in vitamins can compromise your quality of life and harm the state of your health.

Deficiency in B group vitamins can lead to skin and hair problems, issues with your liver and metabolism, and eyesight deterioration.

Deficiency in vitamin C is the cause of bleeding gums and frequent nosebleeds.

If you are deficient in vitamin D, you might be prone to bone fractures and low immunity.

Deficiency in vitamin E is the cause of neuromuscular disorders, myopathy, and anemia.

To avoid these health problems, it is important to get needed vitamins regularly. Experts suggest checking the level of vitamins D, B12, and B9 (folic acid). Here are the warning signs to watch out for, and have a medical test if needed:

Non-healing mouth cracks and ulcers that don't go away (especially in the corners of the lips)
Dryness and irritated skin
Pimples and acne
Sensitive and bleeding gums
Brittle nails, spots, lines, and ridges on nails
Visible hair loss, dandruff, head itching
Eyesight deterioration, redness, swelling, and itching of the eyelids, frequent conjunctivitis
Swelling of limbs and face in the mornings for no obvious reason
Muscle and joint pain, numbness
Having chills
Sleep disorders
Loss of focus, weakness, and fatigue during the day
Irritability, apathy, and depression
Loss of appetite and losing weight without changing eating habits
Diarrhea or constipation
Gaining weight without changing eating habits
Frequent colds

Do you have some or all of the above? Don't take it as proof of vitamin deficiency just yet. The next step is to check your levels of the most important vitamins and minerals to evaluate the deficit. This helps you and your doctor understand how to compensate for it and how long you should take certain additives.

If medical tests show a deficiency in some vitamins, your doctor will prescribe food additives and dosages. Self-medicating is useless—and sometimes even dangerous, as in some situations vitamins can be contraindicated. You can find optimal levels for each vitamin in our application.

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