The evidence desk for supplements

We read the study so a label can’t sell you a story.

Independent, citation-first coverage of vitamins, minerals, and supplements. When the evidence is strong we say so. When it’s hype, we say that too.

Vitamin D softgel capsules beside a glass vial and syringe, with salmon, eggs and cheese on a bright surface

Vitamins

Vitamin D Shots vs Pills: Which One Do You Actually Need?

Vitamin D shots and pills both raise your levels, but they are not interchangeable. Who actually needs an injection, and why steady daily dosing beats mega-doses.

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Several small ceramic dishes holding pale white and golden yellow supplement powders arranged on warm linen

Everyday Benefits

Can You Take Berberine and Inositol Together?

Both are sold for PCOS and blood sugar, and stacking them is everywhere online. What the trials actually compared, and what nobody has tested yet.

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Everyday Benefits

Inositol: What It Does, and How Long It Takes to Work

What inositol actually does for PCOS, insulin and mood, how long before you notice anything, when to take it, and whether the 40:1 ratio matters.

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A Mediterranean-diet spread of olive oil, walnuts, greens, tomatoes and grilled fish on a bright surface

Energy & Longevity

Humanin, MOTS-c and the Mitochondrial Peptides of Aging

Mitochondrial-derived peptides like humanin, MOTS-c and SHMOOSE are tied to healthy aging. Here is the honest science and why there is no supplement to buy.

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Creatine powder, vitamin D capsules, fish oil, magnesium and lean protein foods on a bright surface

Everyday Benefits

Best Supplements for Men: What's Worth It (and What's Hype)

From creatine to vitamin D, the supplements men actually benefit from, why 'testosterone boosters' and men's multivitamins are mostly marketing, and what helps.

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A scoop of whey protein powder, creatine, a shaker bottle, dumbbells and grilled chicken on a bright surface

Muscle & Aging

Best Supplements for Muscle Growth: What Actually Works

Only a few supplements genuinely help you build muscle, and training and protein do the rest. Protein, creatine, and the hyped ones that don't deliver.

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Iron-rich foods, leafy greens, prenatal vitamins, vitamin D capsules and citrus on a bright surface

Everyday Benefits

Best Supplements for Women: What's Actually Worth Taking

From iron to vitamin D, the supplements women most often genuinely benefit from, why 'women's multivitamins' are overrated, and how needs change by life stage.

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How we decide what to recommend

Primary sources only. PubMed, NIH, and position stands, linked so you can check us.
Honest effect sizes. We report how much something helps, including “barely.”
One disclosed recommendation. At most one clearly-marked buying option per article, only if it’s worth it.

Read our editorial standards

Muscle & Aging