In brief, the WADA Prohibited List Committee noted there is not rigorous evidence that clearly demonstrated performance enhancement
Metabolic and epigenomic regulation of Th17/Treg balance by the polyamine pathway
Haematological malignancies: Myeloproliferative disorders (polycythaemia vera, chronic myeloid leukaemia) and some lymphomas increase B12-binding proteins, particularly haptocorrin, raising measured serum levels
I run a Facebook support group for people living with B12 deficiency and Pernicious Anaemia
Safe Dosage Guidelines for Glutathione Dosage plays a major role in whether you experience side effects
In spermatozoa, 0.79 and 0.14 femtograms (i.e., 1015 g) of Se are present in the midpiece and head of spermatozoa, respectively, with 5.6 times higher Se levels and 18 times lower Se concentrations in the midpiece than in the head (85, 92)