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 and small if you lift. Without lifting or dieting, no clear gain has been shown. | established | 0.66 lb of extra fat-free mass in people who lift: 26 comparisons, 1,089 people, in a 2018 review |
| Losing weight, for testosterone For men carrying extra weight, the one lever with Established evidence behind it. The diet version is not sold in a tub. | established | 72 ng/dL gained by men with obesity who lost weight by diet. Surgery: 208. |
| What | Verdict | What we measured |
| TRT Clearly for sex drive. Barely for the energy and mood it is sold on. | supported | +5.52 points on the erectile function index, pooled across five trials and 1,412 men |
| Free versus total testosterone A normal total can hide a low free one. Worth asking about when your SHBG is off or your total is borderline; whether it explains symptoms is contested. | supported | 277 men with a normal total but a low free testosterone, who reported more sexual and physical symptoms on average |
| What | Verdict | What we measured |
| Testosterone boosters The top 16 had never been tested as sold. The few finished products that were rest on one small trial, or a result that did not replicate. | unsupported | -91% of the increased-libido reviews vanished when untrustworthy ones were filtered out |
| Lifting to raise testosterone The hormone spike is real. In the best test, 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 | 30% of men with a first low testosterone result are normal when retested |
| Getting tested without symptoms | unsupported | 15 % of men with normal testosterone who tested as low after a glucose drink |
| What | Verdict | What we measured |
| Krill oil, against fish oil | preliminary | 4 of the 64 pooled trials put krill oil and fish oil in the same trial |
| What | Verdict | What we measured |
| Fat burners | unsupported | 21 studies. not one without diet or exercise |
| NAD+ and NMN | unsupported | 80 of 113 studies in the review were in rodents |
| Methylene blue | unsupported | 26 healthy adults given one dose by mouth |
| Sea moss | unsupported | 57 adults in a placebo trial that found no edge |
| Berberine | unsupported | 14x more weight lost on the drug than on the supplement named after it, each against people not taking it |
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, and for weight loss, where nothing reaches Established for weight loss, and for sleep, where exactly one entry is Supported and what it buys is measured in minutes, and for sweeteners, where every claim is a worry and the ratings run backwards.
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.