Supplementing Supplement wise, B12 is generally safe and most supplements will average in at about 1000 to 2000 mcg, with the NHS advising that 2000 mcg should be about the upper limit
Specifically, glutathione influences the way your body creates melanin
(3) a broad range of side effects, such as drowsiness, dizziness, dry mouth, constipation, weight gain, and sexual dysfunction
[1] [6] As a compounded product, the dosing regimen may be tailored to each patients requirements, and adjustments may be made based on clinical response and tolerability
Some evidence suggests reducing the peptides concentration significantly decreases mast cell activation