Roles of Progesterone in Endometrial Cancer, Endometriosis, Uterine Fibroids, and Breast Cancer Oct 26, 2017 Progesterone actions in women's health conditions Key Points Highlight: Progesterone has distinct roles in the pathogenesis of endometriosis, endometrial cancer, uterine fibroids and breast cancer
The animal studies do show some genuinely interesting signals
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The effect is promising, but again, it came from a very small sample, so read it as "deserves more research" rather than "proven for everyone." Several small clinical trials on oral glutathione, some using doses similar to this product, have shown modest reductions in melanin index and improvements in skin brightness over 4 to 12 weeks
The reason for this is likely due to the role or uric acid as one of the most important antioxidants in body fluids, responsible for the neutralization of over 50% of the free radicals in the blood stream