19XP
Raises testosterone in some men, especially stressed or older men with low levels, in small trials.
Studies1
Men's Sexual Health
Testosterone
Supplements and protocols ranked by XP
18XP
Raises testosterone a little (about 28 ng/dL), relatively more in women.
13XP
Raises testosterone modestly in men, with no effect in women.
10XP
In a small trial, one week of sleeping only 5 hours a night lowered daytime testosterone levels in young healthy men by 10-15%, compared with their own fully-rested baseline.
Studies1
