Supplement dosage checker

Brands add ingredients at trivial amounts to lengthen the label. This compares each ingredient's daily dose against a published reference dose, so you can see which ones are actually there in a meaningful amount.

Not medical advice

This compares label amounts against published reference doses. It is information, not advice, and it is not personalised. Consult a healthcare professional before starting, stopping or combining supplements — particularly if you take prescription medication.

Vitamin D

20 products

Vitamin D supplements compared against the EU Nutrient Reference Value of 5 micrograms a day, with the 100 microgram tolerable upper limit flagged separately.

Omega 3

20 products

Fish and algal oil supplements compared against the EFSA adequate intake of 250 mg of EPA and DHA combined per day. Fish oil weight is not the same as omega-3 content.

Glucosamine

16 products

Glucosamine joint supplements compared against 1178 mg of glucosamine base a day - the base equivalent of the 1500 mg glucosamine sulphate used in the European osteoarthritis trials. Pack strengths usually quote the salt, which is only 53-83% glucosamine.