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It all depends on how many steps the retinoid in question requires to convert to retinoic acid, which is the form of vitamin A that the skin can work with
"Be it the antioxidant activity, synthesis of collagen and elastin, production of energy in the cells, or the melanin formation." Now, let's settle the copper peptides When we deal with the copper peptides, we mainly look at the signaling peptides (stimulate the synthesis of collagen and elastin) and the carrier peptides (deliver trace elements to the skin)
doi:10.1073/pnas.0914399107
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But like everything else, it declines with age
In accordance with the WHO criteria, the European Food Safety Authority (EFSA) has set the average requirement (AR) of iodine at 150 g/day for adults, 70130 g/day for infants aged 711 months and children, and 200 g/day for pregnant women
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