glutathione for kidneys kidney function Oxidative Stress in Non-Dialysis-Dependent Chronic Disease Patients does glutathione help kidney function – Boost Kidney Health with Glutathione:

Overgrowth of bacteria: Some people develop vitamin B 12 deficiency as a result of conditions that slow the movement of food through the intestines (diabetes, scleroderma, strictures, diverticula), allowing intestinal bacteria to multiply and overgrow in the upper part of the small intestine

Weight Fluctuations: Low Body Weight: Being significantly underweight (e.g., due to eating disorders like anorexia or bulimia, or intense athletic training) can disrupt hormonal signals necessary for menstruation

"Environmental-friendly catalysts learned from Vitamin B 12 -dependent enzymes" (PDF)

Dazu gehren zum Beispiel Hyaluronsure, Ceramide oder Niacinamid