Best Supplements for Men: The Trials Were Run on You. It Is Still Mostly Bad News.
Here is the one advantage men have when reading supplement research: the trials were mostly run on men.
That is not a boast, it is a defect in the literature — and we wrote about the other side of it in the version of this page for women, where the honest answer is mostly that nobody checked.
But it does mean that when a supplement fails here, it failed on home ground. We have checked 15 of them. Two work.
Nothing here is for sale and nothing links to a shop. Every row goes to the verdict it came from, so you can check the working.
| What | Verdict | What we measured |
| Creatine One of only two supplements to survive a screen of 250. | established | 2 of 250 supplements that beat resistance training alone. Creatine was one. |
| Protein Real, small, and it does nothing measurable without the training. | established | 0.66 lb of extra fat-free mass, across 49 trials and 1,863 people |
| Losing weight, for testosterone The one thing that reliably moves testosterone is not sold in a tub. | established | 72 ng/dL gained from losing weight by diet. Surgery: 208. |
| What | Verdict | What we measured |
| TRT Clearly for sex drive. Not for the energy and mood it is usually sold on. | supported | +5.52 points on the erectile function index, pooled across 35 trials |
| Free versus total testosterone A normal total number can hide a low free one, which is the single most useful thing on a lab report most men never ask for. | supported | 277 men whose total testosterone read normal — and who had the symptoms anyway |
| What | Verdict | What we measured |
| Testosterone boosters Not one product has ever been tested as a product. | unsupported | -91% of the increased-libido reviews vanished when untrustworthy ones were filtered out |
| Lifting to raise testosterone The hormone spike is real. It made no difference to the muscle. | unsupported | 12% growth in the arm with no hormone spike. The hormone-bathed arm: 10%. |
| The 300 cutoff Where the number that decides whether you are low actually came from. | unsupported | 413 ng/dL — the low cutoff for a man in his late twenties, not 300 |
| Getting tested without symptoms | unsupported | 15 % of men with normal testosterone who tested as low after a glucose drink |
| What | Verdict | What we measured |
| Fat burners | unsupported | 21 trials. the effect crossed zero |
| NAD+ and NMN | unsupported | 80 of 113 studies in the review were in rodents |
| Methylene blue | unsupported | 1 FDA-approved use, and it is a poisoning antidote |
| Sea moss | unsupported | 4 toxic heavy metals the NIH record names in sea moss |
| Berberine | unsupported | 17x more weight lost on the drug than on the supplement named after it |
| Krill oil, against fish oil | unsupported | 12 men in the absorption study the whole category cites |
Two things work, and one of them is a training programme with a powder attached. Everything on the testosterone shelf — the category built specifically to sell to men — failed.
That is worth sitting with, because these products had the friendliest possible conditions. The trials enrolled men. The outcomes were the ones men care about. They still did not clear the bar.
If you want the honest short version: lift, eat enough protein, take creatine if you like, and put the rest of the money somewhere it does something.
The same corpus, asked two other ways: for muscle growth, for women, for gut health and for muscle recovery.
The four ratings are the same ones used on every verdict here, and we wrote down how we read a study so you can see what earns each one.