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Leydig cells in the testes are responsible for testosterone production, and their senescence contributes to the age-related decline in testosterone levels (Zhang et al., 2020)
It also protects the skin from oxidative stress, supports detoxification, and reduces the appearance of fine lines and wrinkles
Human Reproductive Biology (Academic Press, 2013)
Some practitioners suggest methylcobalamin for certain conditions, though robust comparative trials are lacking
Veterinary clinics and animal health professionals
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