While these results are interesting to scientists, they are not proof of safety or effectiveness in humans
J Biol Chem 255:95309533 Griffith OW, Meister A (1979) Glutathione: interorgan translocation, turnover, and metabolism
Niihara Y, Miller ST, Kanter J, Lanzkron S, Smith WR, Hsu LL, Gordeuk VR, Viswanathan K, Sarnaik S, Osunkwo I, Guillaume E (2018) A phase 3 trial of L-glutamine in sickle cell disease
Raw materials are tested upon receipt, and finished products undergo both internal and independent third-party testing for identity, potency, and purity
Each serving (2 capsules) contains: Active ingredients: Hydrolysed bovine collagen (Type 1&3) 500 mg and Glutathione (reduced form) 500 mg
If you want to cycle for cost reasons, 8 to 16 weeks on followed by a few weeks off is a reasonable approximation of a trial period