glutathione is synthesized from calcium synthesis: A two-step pathway. Homeostasis of cellular Glutathione: an overview of biosynthesis

reuteri supplementation increases beneficial bacteria and immune cell populations more significantly in females compared to males, which is probably explained by the immunomodulatory actions of estrogen

The use of calcineurin inhibitors is recommended for sensitive areas, including the face, genitalia, and intertriginous regions, due to their reduced potential for causing skin atrophy (Amiri et al

Another study that compared White (Caucasian) and Black (African-american) skin also found that the Caucasian subjects who had fairer skin were susceptible to more than twice the amount of UVA and UVB rays penetrating the skin compared to their African-american counterparts with darker skin 13 This protective effect of melanin/pigmentation is also supported by the inverse relationship of skin pigmentation and the likelihood of sun-induced skin cancers 14 subjects with White skin are almost 70 times more likely to develop skin cancer than subjects with Black skin 15

The injectable GHK-Cu peptide has some promising science, but its currently not approved for systemic use by the FDA