You Don't Need 27 Supplements
Most of a big supplement drawer has never been shown to help you live longer. In the largest study (about 390,000 adults, 23.5 years), a daily multivitamin was not linked to lower mortality. A short list clears the evidence bar (creatine, vitamin D if you're low, maybe omega-3 or magnesium if intake is low), and the biggest levers, sleep, protein, lifting, walking, were never in a bottle.
See what the biggest study found In about 390,000 healthy US adults followed a median of 23.5 years, daily multivitamin use was not linked to lower mortality (HR about 1.04). See the full multivitamin breakdown on its own page: Do Multivitamins Help You Live Longer?
This is the largest, longest study on the single most common supplement, and it sets the honest baseline for the rest of the drawer.
See the scale of the habit About six in ten US adults (57.6%) use at least one dietary supplement; most have not been shown to move mortality risk in adults without a deficiency
The habit is nearly universal, which is exactly why an honest evidence check matters.
See which supplements have real evidence, and for whom Creatine monohydrate: strong evidence for strength and muscle, suggestive for cognition and aging. Vitamin D: worth it only if you're low or deficient, a large trial found no benefit in adults who already had adequate levels. Omega-3: mixed and modest, about 8% lower heart-attack risk in one analysis, an effect that shrinks in higher-quality trials, food sources first. Magnesium: reasonable if your intake is low, about 48% of Americans fall below the recommended intake
Each entry here is conditional, not a blanket recommendation: the evidence tier and the 'for whom' both matter.
See what actually moves mortality risk About 1 hour a week of strength training is linked to up to about 27% lower all-cause mortality. Each extra 1,000 steps a day is linked to about 15% lower mortality, with about 7,000 steps a day a realistic target. Neither comes in a bottle
These effect sizes are larger and better supported than almost anything in a supplement drawer, and they cost nothing.
Run a 5 minute stack audit For every bottle in your cabinet, ask three questions: what am I taking this for, how strong is the evidence really, and is my intake or level actually low. Keep the 2 to 3 that pass all three, and stop buying the rest: if a supplement fails one of these questions, the honest move is to save the money, not keep taking it on faith.
Most supplements fail one of these three questions; running through them filters the drawer down to what is actually earning its place.
This is the largest, longest study on the single most common supplement, and it sets the honest baseline for the rest of the drawer.
View sources
Dietary Supplement Use Among Adults: United States, 2017-2018 (NCHS Data Brief No. 399, CDC)
Magnesium Fact Sheet for Health Professionals (NIH Office of Dietary Supplements)
Multivitamin Use and Mortality Risk in 3 Prospective US Cohorts (Loftfield et al., JAMA Network Open, 2024)
Vitamin D Supplements and Prevention of Cancer and Cardiovascular Disease: The VITAL Trial (Manson et al., NEJM, 2019)
Resistance Training and Mortality Risk: A Systematic Review and Meta-Analysis (Shailendra et al., Am J Prev Med, 2022)
Not medical advice. This page is for education only and is not a substitute for professional medical care. Consult a qualified clinician before changing your health routine.
Editorial disclosure. This protocol is written and fact-checked by the YourProtocol editorial team directly from the primary sources cited below; it is not written or reviewed by any outside expert.
Is this for you
- Anyone with a big supplement drawer and no clear reason for half of it
- People wondering which supplements are actually worth the money
- Anyone who wants an evidence-ranked shortlist instead of a hundred-item list
- People who would rather spend on sleep, food, and training than more bottles
Cautions
- This is not a claim that all supplements are useless: creatine, vitamin D (if low), omega-3, and magnesium (if low) each have a real, conditional evidence base described above
- The omega-3 and vitamin D benefits are conditional on your starting level or intake being low; in already-replete adults, added supplementation has not shown the same benefit
- The 'about 27% lower mortality' and 'about 15% lower mortality' figures for strength training and steps are 'linked to' associations from cohort studies, not proof that the behavior itself causes a longer life
- This page gives no doses for prescription-only compounds; talk to a doctor before starting any new supplement, especially if pregnant, on medication, or managing a health condition
- Educational only, not medical advice