glutathione side effects and interactions as a skin whitening agent: Facts, myths, evidence controversies What is Glutathione? – GoldBio

Peters et al., 2018

doi: 10.3390/cancers14071820

Dose is also worth flagging

Furthermore, the advantages of curcumin are associated with its interaction with the gut bacteria

systematically compared the transduction distribution of AAV1, 2, 5 and 8 serotypes in the knee joints of mice and found that different AAV serotypes showed different tissue tropisms in tissues such as synovium, cartilage and subsynovial bone (181)

Some clinical studies and recent reviews suggest that oral glutathione may contribute to brightening or melasma-related improvement in certain contexts, often around the 250 to 500 mg per day range, but the body of evidence is still relatively small and not as robust as the marketing often implies