Opinion: I used to think supplements were all much the same, until we started reviewing them - Which?

Supplements Research Reveals Big Differences

Our supplements research reveals big differences, including dosage disparities, bioavailability and how much of a tablet is just filler.

A public health nutritionist with 20+ years at Which? and the NHS notes that when looking for a daily supplement, choosing the cheapest option may not be the best idea.

you could end up paying for a less effective tablet - but equally paying a premium doesn't always pay off either.

This research highlights the importance of careful consideration when selecting supplements.

Author's summary: Supplements vary greatly in effectiveness.

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Which? Which? — 2025-10-14

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