Most testosterone advice is supplement marketing. Here, every claim is ranked by the strength of the research behind it, so you can spend your effort on what works.
Step-by-step playbooks built on the research, without the hype.
A practical, research-backed plan covering sleep, body composition, training, supplements, and the right blood tests to ask your doctor about.
Launching soon
See what is insideA focused guide to fixing your sleep schedule, environment, and habits.
In developmentSimple training templates for beginners through intermediates.
In developmentTotal and free testosterone, SHBG, and related markers, explained in plain language.
In developmentPlain-language summaries of the studies behind the guides, each with an honest read on how strong the evidence is.
| Topic | What the research says | Evidence |
|---|---|---|
| How low testosterone is actually diagnosed | Diagnosis needs a low blood level on two early-morning tests, plus symptoms. | Clinical guideline |
| Sleep and testosterone | A week of 5-hour nights lowered daytime testosterone by 10 to 15 percent. | Strong |
| Weight loss and testosterone | Losing excess weight is linked to higher testosterone in men with obesity. | Strong |
| Exercise and resting testosterone | In trials, training barely moved resting testosterone in men with normal levels. | Limited |
| Vitamin D and testosterone | Reviews of randomized trials disagree. Evidence for a boost is weak. | Limited |
| Ashwagandha, fenugreek, and other herbs | Ashwagandha and fenugreek show small average increases in trials of limited quality. | Moderate |
Knowing your numbers, sleeping well, and training consistently. Here is what to look for before you buy.
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A baseline total testosterone result gives you something concrete to bring to a doctor. One reading does not diagnose anything.
What to look for:
Sleep is the best-supported lever on this site. Cheap fixes for light and noise often matter more than gadgets.
What to look for:
Training will not reliably lift testosterone on its own, but it helps body composition, which does.
What to look for:
One email when new research summaries and guides go live. A members' community is planned, and waitlist members get first access.