around 400-800mg a day, which increases dopamine, adrenaline, and increases testosterone and athletic performance.
https://pubmed.ncbi.nlm.nih.gov/18458357/ increased testosterone acutely after large caffeine dose, (with the highest dose 800 mg producing an additional 21% rise compared to placebo.)
https://www.mdpi.com/2072-6643/16/19/3228 again caffeine intake pre exercise showed superior testosterone levels in men.
https://pubmed.ncbi.nlm.nih.gov/24867603/ increased testostrone levels
All together mega doing caffeine up to 800mg shows short term testosterone boosts in men.
Don't go take 800mg of caffeine and don't do anything dangerous of course
https://pubmed.ncbi.nlm.nih.gov/18458357/ increased testosterone acutely after large caffeine dose, (with the highest dose 800 mg producing an additional 21% rise compared to placebo.)
https://www.mdpi.com/2072-6643/16/19/3228 again caffeine intake pre exercise showed superior testosterone levels in men.
https://pubmed.ncbi.nlm.nih.gov/24867603/ increased testostrone levels
All together mega doing caffeine up to 800mg shows short term testosterone boosts in men.
Don't go take 800mg of caffeine and don't do anything dangerous of course

