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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)
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Veterinary clinics and animal health professionals
Refrigerate at 2C8C as indicated on the label, keep the vial sealed and away from light, and do not freeze it: freeze-thaw cycling can damage peptides already in solution
Early clinical research on topical use shows promising brightening with good tolerability, especially when paired with complementary actives and consistent SPF
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