Iron supplement with vitamin C
For deficiency confirmed by a blood test, not on a hunch - excess iron is harmful.
GoPharma
Over-the-counter wellness and daily-care products.
The supplement aisle is where hope is sold by the bottle. Some of it is genuinely useful. Much of it is expensive urine.
Vitamin D, because deficiency is genuinely widespread in India even in sunny cities.
Vitamin B12, for vegetarians and vegans, where it is not optional.
Iron, where a blood test has shown deficiency - and not otherwise, because excess iron is harmful.
Folic acid in pregnancy and before it, which prevents serious birth defects and is one of the best-evidenced supplements there is.
Calcium, where diet genuinely does not supply it.
Every item above corrects a known deficiency. That is what supplements are good at. Taking nutrients you are not short of does not produce extra health, and for the fat-soluble vitamins - A, D, E, K - it can accumulate and cause harm.
Test, then supplement. Supplementing on a hunch is how people end up with expensive urine and occasionally a real problem.
Look for a FSSAI licence number, a full ingredient list with quantities, a batch number and an expiry date. Be sceptical of proprietary blends that will not say how much of anything is in them, and of any product claiming to treat a named disease - in India that claim is not legal on a supplement.
For deficiency confirmed by a blood test, not on a hunch - excess iron is harmful.
Picked to go with what you have just read. We only list ordinary, widely available things.