Part of the reason why peptides have taken off in the way that they have is because of their purported ability to improve athletic performance, speed up recovery from injuries, boost cognitive function, reduce fatigue, and moreall things that any reasonable, healthy person would find appealing
Endothelial dysfunction, including decreased endothelial cell-dependent vasorelaxation, is increasingly proposed to be triggered by free radicals generated during auto-oxidation of homocysteine (Loscalzo, 1996)
Indeed, the stronger relationship between elevated circulating homocysteine levels and atherothrombotic disease observed in retrospective case-controlled studies than in prospective studies might be explained by the younger average age of subjects sustaining a coronary event in retrospective studies (in the positive study by Wald et al (1998), see the age comparison between retrospective and prospective studies)
In this regard, genetic predisposition and gene polymorphisms, sun exposure and UV radiation, hormonal changes, underlying disorders including thyroid disorders, pregnancy, and also drug-induced melasma have critical roles in melasma induction
