glutathione sulfhydryl oxidation Pathways for thiol in the ER.Black arrows represent the entry Glutathione/Glutaredoxin in Cellular Redox Homeostasis

This is actually one of the more common causes of high vitamin B12 levels

10.1111/acel.12796 69 YueS.WangL.DeMartinoG

Its important to distinguish these cosmetic issues from specific conditions, such as Perianal Pseudoverrucous Papules and Nodules (PPPN), which can result from chronic irritation and present with terms like "chronic papillomatous dermatitis" or "reactive acanthosis." These are not the same as cosmetic "anal darkening," further emphasizing the need for a professional evaluation

10.3389/fonc.2022.693395 63 LiZ.-j.DaiH.-q.HuangX.-w.FengJ.DengJ.-h.WangZ.-x.et al (2020b)

Glucokinase has a much lower affinity for glucose than does hexokinase