RG, reduced glutathione
For a broader explanation of oral, reduced, liposomal, S-acetyl, sublingual, intravenous and precursor approaches, read What Is the Best Form of Glutathione
Remember that natural ingredients work gradually but safely, typically showing noticeable results within 2-4 weeks for fresh tan and 2-3 months for deeper pigmentation
doi: 10.1016/j.ijbiomac.2020.06.275 119
Research published in the European Journal of Nutrition confirmed that a single dose of 1,000 mg oral glutathione produced only modest and variable increases in blood GSH levels, with absorption rates highly inconsistent between individuals
So for reasons that make a lot of sense to Joe, he ends up killing a bunch of people including Beck