The supplement aisle is where hope and evidence part company most dramatically. A committed enthusiast’s stack can run to a dozen or more products, most bought on a persuasive recommendation and never questioned since — and most, when set against the best available evidence, do very little. But dismissing supplements entirely is as unthinking as taking everything: a short list genuinely earns its place. This is an evidence audit of the categories that dominate most stacks, and the handful of things actually worth taking.
Why most of the stack does little
The gap between marketing and evidence in supplements is unusually wide, for structural reasons. Supplements are regulated more loosely than medicines, so claims can run ahead of proof. The most heavily marketed products are rarely the best evidenced. And large, well-conducted trials have repeatedly failed to find benefit where enthusiastic early studies or plausible mechanisms suggested it should exist. The multivitamin is the emblem: despite near-universal use, a large analysis following hundreds of thousands of adults over two decades found daily multivitamin use associated with no reduction in mortality. Major trials of individual antioxidants — vitamin E, beta-carotene, selenium — have likewise come up empty, and occasionally worse than empty.
The evidence, category by category
| Category | Where the evidence stands |
|---|---|
| Multivitamins | No demonstrated mortality benefit in large studies of healthy adults |
| Isolated antioxidants (E, beta-carotene) | No benefit, and harm in some populations; among the clearest negatives |
| Resveratrol | Spectacular in yeast and mice; faded when tested properly in humans |
| NAD+ precursors | Reliably raise NAD+ levels; human ageing-outcome evidence not yet there |
| Greens powders | Premium price, essentially no outcome evidence |
| Protein (diet or supplement) | Solid support, especially for adults over 40 preserving muscle |
| Creatine monohydrate | Among the most studied compounds; consistent for strength, promising elsewhere |
| Vitamin D (if deficient) | Worthwhile for correcting a measured deficiency, common and consequential |
| Omega-3 (in context) | Reasonable in specific cardiovascular and dietary situations |
This article addresses medications, supplements, screening or diagnostics. It carries editorial review and cites primary literature and official guidelines; it has not been reviewed by a clinician, and it is not medical advice. See our Editorial Policy. Any decision described here belongs with your own physician.
The short list that survives
Read the table and a pattern emerges: what survives is either broadly evidenced, personally indicated, or both. Protein adequacy has real support and matters more with age. Creatine monohydrate is cheap, exhaustively studied and genuinely effective for strength, with encouraging signals beyond it. Vitamin D earns its place when a test shows you are actually deficient — not as a blanket habit. Omega-3s make sense in particular contexts. And anything a physician has prescribed for a diagnosed condition is in a different category entirely. Notice what is absent: the exotic, the trend-driven, the heavily advertised. Those are precisely the items that dominate spending and contribute least.
How to audit your own stack
The exercise is simple and clarifying. List everything you take, with its annual cost. Then ask of each item one question: what is the evidence that this does something for me, specifically? “A podcast recommended it” and “it seems like it should help” are not answers. The items that pass — broad evidence, or a personal indication like a measured deficiency — stay. The rest are candidates for removal, and removing them frees money and attention for the fundamentals that actually move healthspan. Most people who do this honestly end up taking less, spending less, and losing nothing.
The larger point
Supplements are not the villain of personal health, but they are the clearest example of its central error: adding things in the hope of benefit rather than subtracting what does not earn its place. The evidence-based approach is neither credulous nor cynical — it keeps the short list that works, drops the long list that does not, and redirects the freed resources toward sleep, strength, fitness and the other unglamorous fundamentals that no bottle can replace. That is not a smaller approach to your health. It is a more serious one.
Sources
- US Preventive Services Task Force. Vitamin, mineral, and multivitamin supplementation to prevent cardiovascular disease and cancer: recommendation statement. JAMA, 2022 — available from the USPSTF.
- Guallar E, Stranges S, Mulrow C, Appel LJ, Miller ER. Enough is enough: stop wasting money on vitamin and mineral supplements. Annals of Internal Medicine, 2013.
- Bjelakovic G, Nikolova D, Gluud C. Antioxidant supplements to prevent mortality. Cochrane Database of Systematic Reviews, 2012.
- Manson JE, et al. Vitamin D supplements and prevention of cancer and cardiovascular disease (VITAL). New England Journal of Medicine, 2019.
- Sesso HD, et al. Multivitamins in the prevention of cardiovascular disease in men: the Physicians’ Health Study II. JAMA, 2012.
- Dietary supplement fact sheets for individual nutrients — available from the NIH Office of Dietary Supplements.