What to take for skin
Graded by the strength of the evidence — strongest first. Nothing here is sold to you.
Collagengrade C— small improvements in skin elasticity/hydration in some RCTs; industry-funded bias common
Zincgrade C— Acquired zinc deficiency is deeply involved in the development of skin diseases including acquired acrodermatitis enteropathica, necrolytic migratory erythema, alopecia, and delayed wound healing, and mutations or dysregulation in zinc transporters are associated with skin manifestations.