Do you need a multivitamin? Who benefits, biotin, glutathione and how to read the label
Most healthy adults who eat roti, daal, sabzi, dairy, eggs and fruit do not need a multivitamin. It helps when there is a real gap: folic acid before and in early pregnancy, B12 for strict vegetarians, vitamin D for older or indoor adults, and iron for heavy periods. Test first (CBC, ferritin, B12, vitamin D). Biotin does not fix hair fall and glutathione does not safely whiten skin.
Who actually benefits from a supplement
Supplements are for gaps, not for everyone. These are the groups where guidelines support them, and what to check first.
| Group | Why | Next step |
|---|---|---|
| Planning pregnancy or in the first 12 weeks | Folic acid before conception and in early pregnancy lowers the risk of neural tube defects. Guidelines advise 400 micrograms a day; a higher dose is prescribed for women with diabetes, obesity, epilepsy or a previous affected pregnancy. | Ask your doctor; see the fertile window page and pregnancy diet |
| Strict vegetarians and vegans | Vitamin B12 is found only in animal foods. Those who eat no milk, dahi or eggs cannot get enough from food. | Check B12; see vitamin B12 |
| Older adults, people who stay indoors or cover most skin | Low vitamin D is very common in Pakistan, and B12 absorption falls with age. | Check vitamin D and B12; see vitamin D |
| Women with heavy periods, or with anaemia on a CBC | Iron deficiency is the commonest deficiency. A multivitamin rarely contains enough iron to treat it. | Test CBC and ferritin first; see iron-rich foods |
| People on metformin or long-term acid-reducing medicines | Both can lower vitamin B12 absorption over the years. | Ask your doctor about a B12 test |
| After stomach or weight-loss surgery, or with coeliac or other gut disease | Absorption of several vitamins and minerals is reduced. | Needs a doctor and dietitian, not a self-chosen product |
| Very restricted diets, eating disorders, or very low-calorie plans | Food is not supplying the full range of nutrients. | Fix the diet first; a plan supervised by a dietitian |
Who usually does not need one
A healthy adult who eats chapati, daal or chana, 2 to 3 servings of sabzi and fruit, milk or dahi and eggs, chicken or fish a few times a week typically gets what is needed. If your tiredness, weak nails or hair fall is the reason you are buying vitamins, test first: the cause is often iron, thyroid, vitamin D or B12, and the right treatment differs for each. Use the balanced diet chart to check your plate.
Test first: which blood tests answer the question
| If you feel or have | Ask your doctor about |
|---|---|
| Tiredness, pallor, breathlessness, heavy periods, hair fall | CBC (haemoglobin) and ferritin; see haemoglobin and ferritin ranges |
| Tingling or numbness in hands and feet, sore tongue, vegetarian diet, long-term metformin | Vitamin B12 |
| Bone or muscle pain, frequent illness, little sun | Vitamin D (25-OH) |
| Weight change, tiredness, hair fall, feeling cold or hot | TSH; see TSH normal range |
| Planning pregnancy | CBC, ferritin, blood sugar and a prenatal plan with folic acid |
Biotin, hair and lab-test interference
Biotin (vitamin B7) is promoted for hair, skin and nails. It is a real vitamin, but deficiency is rare, because it is found in eggs, nuts, daal, milk and many other foods, and the studies that exist do not show benefit in people who are not deficient. Hair fall is far more often due to iron deficiency, thyroid disease, PCOS, a crash diet or stress.
Biotin is also a known problem for blood tests. High doses can make some thyroid, hormone and troponin tests read falsely high or low, which has led to wrong diagnoses. If you take biotin, tell your doctor and the lab, and ask whether to pause it before a test. See the hair fall diet page for the foods, tests and causes that matter more.
Glutathione and skin whitening
Glutathione is an antioxidant that the body makes itself. Tablets, "gluta" drips and injections are sold with the promise of whiter skin, but there is no good evidence that they lighten skin safely or lastingly. The available studies are small, short and often funded by the sellers, and injections have been linked to serious allergic and skin reactions, liver and kidney injury and infections from unsterile products. Skin colour is mainly genetic and sun exposure changes it; no supplement can safely change it. If you are concerned about dark patches, melasma or uneven tone, see a dermatologist, and use sunscreen daily.
How to read a supplement label
- Check the amount and the unit of each nutrient and compare it with the reference intake for your age and sex. Many products give "% of daily value" on the pack.
- Avoid megadoses of single nutrients. The tolerable upper limit exists because too much vitamin A, vitamin D, zinc, iron, selenium, calcium or vitamin B6 can cause harm.
- Count what you already take. A multivitamin plus a calcium tablet plus a "hair" capsule can add up to far more than any one label shows.
- Check vitamin A in pregnancy: products with retinol in large amounts are not advised; ask your doctor.
- Check iron and keep it away from children. Iron is a leading cause of poisoning in young children, and a man or post-menopausal woman should take iron only if tests show a need.
- Check the manufacturer details, batch number and expiry, and buy from a licensed pharmacy. Avoid unlabelled imports and online products with miracle claims.
- Be wary of words such as "detox", "boost", "whitening", "fat burner" and "natural cure". None of them is a medical claim you can rely on.
Interactions to know about
- Thyroxine (levothyroxine): iron, calcium and some multivitamins reduce its absorption. Keep them at least 4 hours apart.
- Warfarin: vitamin K in multivitamins and green leafy foods can change the effect; keep intake steady and tell your doctor.
- Metformin and acid-reducing medicines: can lower B12 over time; ask about testing.
- Antibiotics such as doxycycline and ciprofloxacin: bind to calcium, iron and zinc; take them at different times.
- Iron and tea: chai within an hour of a meal or tablet lowers iron absorption.
Always tell your pharmacist and doctor about every supplement, including herbal products. A dietitian can then check your food and your reports and tell you what you really need. See the online consultation.
See a doctor first if
- You are pregnant, planning pregnancy or breastfeeding (do not self-select a product)
- You take warfarin, thyroxine, metformin, chemotherapy, anti-epileptic drugs or any regular medicine
- You have kidney disease, liver disease or a history of kidney stones
- You are tired, pale, losing hair, have tingling hands or feet, or heavy periods: test first
- You are considering glutathione, "whitening" or other injections or drips
- You have taken high-dose supplements and feel nauseated, have headaches, skin changes or hair loss
Common questions
Do I need a multivitamin?
Most healthy adults who eat a mixed diet of roti, daal, sabzi, dairy, eggs and fruit do not need one. A multivitamin helps people with a specific gap: pregnancy, strict vegetarians, older adults, heavy periods and certain medicines or surgery. Test first, then supplement the gap.
Which is the best multivitamin in Pakistan?
No product is best for everyone, and we do not rank brands or quote prices. What matters is what is in the tablet and whether you are actually short of it. Compare the label with the reference amounts, avoid products with very high doses of single nutrients, and ask your doctor or pharmacist to check them against your medicines.
Is it safe to take a multivitamin every day?
A standard multivitamin at the labelled dose is safe for most healthy adults. Problems arise when you take several products that each contain vitamin A, iron, zinc or calcium, take megadoses, or take it with medicines such as warfarin or thyroxine without checking. Do not exceed the label.
Does a multivitamin give energy or help weight loss?
Only if you are deficient. Vitamins do not contain calories, so they do not give energy by themselves. In people with normal levels, B vitamins and multivitamins have not been shown to improve energy or cause weight loss. Tiredness has many causes (anaemia, thyroid, poor sleep, low vitamin D); test before you assume.
Do biotin tablets stop hair fall?
Biotin deficiency is rare, and in people who are not deficient there is no good evidence that biotin improves hair or nails. Common causes of hair fall are low iron, thyroid disease, PCOS and crash dieting. High-dose biotin also interferes with some lab tests, including thyroid tests and troponin (a heart attack test), so tell your doctor if you take it and stop it only as advised before blood tests. See our hair fall diet page.
Do glutathione tablets or injections whiten skin?
There is no good evidence that they safely or lastingly lighten skin. The few small studies are short and of low quality. Glutathione is made by the body, and the risks of injections, which have been linked to serious skin reactions, liver and kidney problems and infection, outweigh the unproven benefit. Skin colour is mostly genetic and changes little with any tablet. Skin lightening needs a dermatologist, not a supplement.
Can I take a multivitamin in pregnancy?
Take only a product made for pregnancy, or the folic acid and iron your doctor prescribes. Ordinary multivitamins can contain vitamin A in the retinol form, and too much in early pregnancy can harm the baby, so check with your doctor. Do not eat liver (kaleji) in pregnancy for the same reason.
Can a multivitamin replace healthy food?
No. Food contains fibre, protein, healthy fats and thousands of compounds that a tablet does not. Large studies have not shown that multivitamins prevent heart disease or cancer in healthy adults. A supplement fills a gap; it does not repair a poor diet.
What is the difference between B-complex, multivitamin and "Z" or zinc products?
A B-complex contains only the B vitamins, a multivitamin contains many vitamins and often minerals, and some products add zinc or vitamin C. Names vary by brand, so read the label rather than the name. Take only the nutrients that you need.
When is the best time to take a multivitamin?
With a meal, because the fat in food helps you absorb vitamins A, D, E and K and reduces stomach upset. Keep iron and calcium apart, and keep iron, calcium and zinc at least 4 hours away from thyroxine unless your doctor advises otherwise.
Are children's multivitamins needed?
Most children who eat a mixed diet do not need one. Children who are very picky, vegetarian, underweight or low in vitamin D may, as advised by a paediatrician. Keep all supplements, especially those with iron, out of children's reach; iron overdose is a leading cause of poisoning in young children.
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Sources
- NIH Office of Dietary Supplements. Multivitamin/mineral supplements: fact sheet for health professionals
- NIH Office of Dietary Supplements. Biotin: fact sheet for health professionals
- NIH Office of Dietary Supplements. Folate: fact sheet for health professionals
- NIH Office of Dietary Supplements. Vitamin A: fact sheet for health professionals
- NIH Office of Dietary Supplements. Iron: fact sheet for health professionals
- US FDA. Safety communication: biotin may interfere with lab tests
- Sonthalia S et al. Glutathione for skin lightening: a regnant myth or evidence-based verity? Dermatol Pract Concept, 2018