In case there was any doubt, men on vegan diets have as much testosterone as men who eat meat, according to a study published in the World Journal of Urology. Researchers assessed diet records for 191 participants and tracked their testosterone levels, finding no differences in testosterone levels. These results show that men do not need to consume meat or other animal products to maintain normal testosterone levels.
Kuchakulla M, Nackeeran S, Blachman-Braun R, Ramasamy R. The association between plant-based content in diet and testosterone levels in US adults. World J Urol. Published online May 28, 2020.