Last reviewed on 11 September 2026.
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This post goes through the evidence, the people who may benefit, how to read an Indian supplement label, and the particular question many women over 30 ask.
Do healthy adults need a multivitamin?
Most do not. An adult eating cereals, pulses, vegetables, fruit, dairy and, if they choose, eggs, fish or meat gets nearly every vitamin and mineral in adequate amounts. The nutrients Indians most often lack, such as vitamin B12, vitamin D and iron, frequently need a specific dose to correct, which a general multivitamin may not supply. A supplement makes the most sense when it answers a known gap, not when it is bought as insurance against a diet that is already adequate.
Do multivitamins prevent heart disease or cancer?
The evidence says probably not, or at least not measurably. In 2022 the US Preventive Services Task Force reviewed the trials and concluded there was insufficient evidence to say whether multivitamins prevent cardiovascular disease or cancer. It went further for two single nutrients, recommending against beta-carotene and vitamin E supplements for that purpose: vitamin E showed no benefit, and beta-carotene raised the risk of lung cancer in people already at high risk, such as smokers. Most of these trials were run in well-nourished Western adults, which is worth keeping in mind.
Has any large trial found a benefit?
One found a small one. The Physicians' Health Study II gave about 14,600 male American doctors aged 50 and over a standard multivitamin or a placebo for roughly eleven years. Cancer diagnoses were about 8 per cent lower in the multivitamin group, but there was no reduction in heart attacks, strokes or deaths from heart disease. These were well-fed, mostly non-smoking doctors, so the result may not transfer to other groups. A 2024 analysis of three large US cohorts, covering about 390,000 adults, found that people taking a daily multivitamin did not live any longer than those who did not.
Can a multivitamin help memory in older adults?
Possibly, but the research is ongoing. Sub-studies of the COSMOS trial in the US reported that older adults taking a daily multivitamin scored slightly better on memory and cognitive tests after two to three years than those on placebo. The effects were small, the participants were mostly white Americans, and the findings need confirming in other populations before anyone treats a multivitamin as a way to prevent dementia. For now it is an interesting signal, not a recommendation.
Who may genuinely benefit from supplements?
Several groups, usually from a targeted product rather than a general multivitamin. They include women planning a pregnancy or already pregnant, older adults whose appetite has shrunk, strict vegans, people with conditions that impair absorption such as coeliac disease or inflammatory bowel disease, anyone who has had bariatric surgery, people on very restrictive or very low-calorie diets, and people with a diagnosed deficiency. Older adults also absorb B12 less well as stomach acid falls, and long-term use of metformin or acid-reducing medicines lowers it further. Strict vegans need a reliable B12 source, whatever else they take.
Is a multivitamin enough in pregnancy?
No, and it is not a substitute for what the antenatal clinic prescribes. Folic acid is advised from before conception, ideally at least a month earlier, because it lowers the risk of neural tube defects. During pregnancy, government antenatal care in India provides iron and folic acid tablets, and calcium supplements, which should be taken as prescribed. Prenatal multivitamins can fill other gaps but should avoid high-dose retinol. Every supplement taken in pregnancy should be one the obstetrician knows about, and the pregnancy diet guide covers the meals that go with them.
What is the best multivitamin for women over 30?
There is no single best product; the useful approach is to test first and then supplement what is actually low. For Indian women the common gaps are iron, calcium, vitamin D and vitamin B12. NFHS-5 found about 57 per cent of women aged 15 to 49 to be anaemic, and heavy periods, pregnancies and vegetarian diets all push iron down. Simple blood tests, a complete blood count, ferritin, 25-hydroxy vitamin D and B12, show which gaps are real. The food side is covered in the posts on iron-rich Indian foods and vitamin D deficiency in India.
Do men need a multivitamin with iron?
Usually not. Men and post-menopausal women rarely need extra iron unless a deficiency has been diagnosed, and the body has no efficient way to get rid of surplus iron, so it accumulates. People with haemochromatosis, an inherited iron overload condition, can be harmed by it. Many formulas aimed at men or older adults leave iron out for exactly this reason. Iron tablets are also one of the more common causes of serious poisoning in young children, so any product containing iron belongs on a high shelf, well out of reach.
How do you choose a multivitamin?
Look for doses close to 100 per cent of the RDA for each nutrient, not several times it. Megadoses rarely help and, for vitamins A, D, E and B6, can cause harm. Skip products padded with herbal extracts and "proprietary blends" that list ingredients without amounts, since they add cost and interaction risk without evidence. Choose a formula with iron only if you need iron. Check whether vitamin A comes as retinol or beta-carotene, and how much. A plain, modestly dosed tablet is usually a better buy than a long, impressive-looking label.
Choosing a tablet, and taking it
In this order, because the first step often decides that the rest is not needed at all.
Test before you buy
A complete blood count, ferritin, 25-hydroxy vitamin D and B12 show which gaps are real. A product chosen without them is a guess.
Look for modest doses
Close to 100 per cent of the RDA for each nutrient, not several times it. Megadoses rarely help, and for vitamins A, D, E and B6 they can cause harm.
Skip the padding
Herbal extracts and proprietary blends that list ingredients without amounts add cost and interaction risk without evidence for either.
Take iron only if you need iron
Men and post-menopausal women rarely do, the body has no efficient way to shed a surplus, and any product containing it belongs well out of a child's reach.
Check the licence on the label
An FSSAI number, nutrients with amounts per serving, and no claim to cure or treat anything. A product with no licence information stays on the shelf.
Take it with a meal that carries some fat
Vitamins A, D, E and K are absorbed with fat. If the tablet contains iron, keep it away from tea, coffee and calcium-rich foods for an hour or two.
What should an Indian supplement label show?
An FSSAI licence number, a full list of nutrients with amounts per serving, and, for products sold as health supplements, the words "not for medicinal use". Supplements regulated by FSSAI are not allowed to claim they cure or treat disease, so a label that promises to reverse diabetes or cure hair fall is a warning sign. Some multivitamins are sold under a drug licence instead and carry drug manufacturing details. A product with neither kind of licence information should stay on the shelf, however good the packaging looks.
Can a multivitamin interact with your medicines?
Yes, with several common ones. Vitamin K in a multivitamin can alter the effect of warfarin, so anyone on it needs a consistent intake and their doctor's approval. Calcium, iron, zinc and magnesium bind to levothyroxine and to some antibiotics, including tetracyclines and quinolones, so they must be taken hours apart. High-dose biotin can distort thyroid and heart test results. People on prescription medicines, and anyone with kidney or liver disease, should ask their doctor or pharmacist before starting a multivitamin, and bring the actual bottle to the appointment.
Is a B-complex the same as a multivitamin?
No. A B-complex contains only the B vitamins, often at doses well above the RDA, while a multivitamin spreads across most vitamins and usually some minerals too. In India a B-complex is frequently prescribed alongside antibiotics or for a specific deficiency. The separate post on vitamin B-complex tablets covers when those make sense and what the doses on the strip mean.
Are gummy or effervescent multivitamins as good?
Often not. Gummies commonly leave out iron and several minerals, which are hard to fit into a sweet, and most contain added sugar. Effervescent tablets often carry a notable amount of sodium, a concern for anyone with high blood pressure. Both look and taste like treats, which is a hazard in a house with small children. If a supplement is needed, a plain tablet or capsule usually delivers more of what is on the label for the money.
When is the best time to take a multivitamin?
With a meal, ideally one that contains some fat, because vitamins A, D, E and K are absorbed with fat and many people find tablets easier on the stomach after food. If the product contains iron, keep it away from tea, coffee and calcium-rich foods for an hour or two, since these reduce iron absorption. Taking it at the same time each day makes it easier to remember, which matters more than the exact hour.
Understanding supplements well enough to advise others
Anyone who fields supplement questions, from pharmacy staff and trainers to nutritionists, will hear the multivitamin question constantly. NNWA's Dietary Supplements & Nutraceuticals course runs four to six weeks at an intermediate level and works through vitamins and minerals, protein and sports supplements, herbal products and nutraceuticals, label reading, safety and interactions. It costs 11,999 rupees, down from 17,999, and leads to an NNWA certificate.
The honest summary
For most healthy adults with a varied diet, a multivitamin adds little, and large trials have not shown it prevents heart disease or cancer. It earns its place in pregnancy, older age with poor appetite, strict veganism, malabsorption and diagnosed deficiency. Test before you buy, choose modest doses, add iron only when it is needed, and tell your doctor about any supplement you take alongside medicines.