Alcohol and testosterone: the dose is the whole story
One drink and ten drinks do opposite things to male hormones. What controlled feeding studies and a 2023 review of the evidence actually found.
16 September 2026 · 4 min read
All articles
9 guides on what actually moves testosterone, each one linked to the studies it rests on. Newest first.
Body fat and testosterone: why the waistline comes before the supplement shelf
Adipose tissue converts testosterone into oestrogen and blunts the signal to make more. Here is the mechanism, and what weight loss reliably and unreliably changes.
16 September 2026 · 3 min read
Does overtraining lower your testosterone? The evidence is thinner than the forums say
A systematic review of 38 studies found basal hormone levels were mostly normal in overtrained athletes. That makes the fatigue argument stronger, not weaker.
16 September 2026 · 3 min read
Herbal testosterone supplements: what the trials actually found
A systematic review examined the herbs sold as testosterone boosters. Two had reasonable supporting trials, several had almost nothing, and the reasons matter.
16 September 2026 · 4 min read
Lifting weights and testosterone: the spike is real, the lasting rise mostly is not
Heavy training reliably raises testosterone for less than an hour. Meta-analyses of resting levels after weeks of training tell a much quieter story.
16 September 2026 · 4 min read
Sleep and testosterone: what one bad week actually does
A small University of Chicago study put men on five-hour nights for a week and measured what happened. Here is what it found, and what it did not.
16 September 2026 · 4 min read
Stress, cortisol and testosterone: usually the brain, usually reversible
Sustained stress lowers testosterone by quietening the signal from the brain, not by breaking the testes. What military and endurance studies show about recovery.
16 September 2026 · 3 min read
Vitamin D and testosterone: the study everyone quotes, and the one that followed it
One small 2011 trial made vitamin D look like a hormone fix. A better-designed trial and a pooled analysis of eight studies reached a different conclusion.
16 September 2026 · 3 min read
Zinc, magnesium and testosterone: what the two ZMA trials actually found
An industry-funded study said a zinc-magnesium blend raised free testosterone. A larger independent one, run eight weeks later, found nothing at all.
16 September 2026 · 3 min read
Browse by section
- Sleep
Sleep and testosterone: what one bad week actually does
- Training
Does overtraining lower your testosterone? The evidence is thinner than the forums say
Lifting weights and testosterone: the spike is real, the lasting rise mostly is not
- Nutrition
Alcohol and testosterone: the dose is the whole story
- Body Composition
Body fat and testosterone: why the waistline comes before the supplement shelf
- Stress & Recovery
Stress, cortisol and testosterone: usually the brain, usually reversible
- Supplementation
Herbal testosterone supplements: what the trials actually found
Vitamin D and testosterone: the study everyone quotes, and the one that followed it
Zinc, magnesium and testosterone: what the two ZMA trials actually found