Answer: Drink coffee
Clues: “Consume” and “Black”
In A Nutshell
- Men who drank more coffee daily had significantly higher total testosterone, with each extra daily cup linked to a 0.29 nmol/L rise, even after accounting for weight, smoking, activity, and alcohol.
- Heavier coffee drinkers, as a group, also had less body fat and more muscle, though the heavy-drinking group skewed more male, which may partly explain that pattern.
- The testosterone picture is more tangled than it looks: coffee drinkers had more total and usable testosterone, but less free testosterone, a combination researchers call metabolically relevant, not proven beneficial.
- The study only captured a single point in time, so it cannot say whether coffee is raising testosterone, whether higher testosterone leads to more coffee drinking, or whether something else explains both.