foxo4-dri senolytic 2024 study improves spermatogenesis in aged mice through reducing senescence-associated secretory phenotype secretion from Leydig cells Mechanisms of action of senolytic
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The results of those studies show the following

Genetic sensitivity to DHT causes progressive follicle miniaturization in characteristic patterns

Although this isnt a direct effect of B12, improving energy and well-being can lead to better appetite control and fewer emotional eating episodes

doi: 10.1002/cbic.200900474
It is used to aid in weight loss and provide an immediate energy boost