oral glutathione skin whitening study has been everyone on my timeline but does it actually work?! Looking at the data, it’s very modest to be honest. I’d recommend sticking to what we know works fo hyperpigmentation in Glutathione Tablets For Skin Whitening:

Analyses were adjusted for age, sex, BMI, Townsend index, energy, alcohol, and carbohydrate intake

Extracellular glutathione S-transferase omega-1, a cytosolic enzyme that modulates the S-thiolation status of intracellular factors involved in the inflammatory response, and its polymorphisms have been associated with an increased risk to develop COPD and could have a biological and clinical significance in cystic fibrosis (115)

The delayed release and sublingual formulations may improve this percentage, but by how much remains uncertain

Benefits: Brightens & evens tone: Niacinamide, Tranexamic Acid + Glutathione fade dark spots

They monitored the oocyte development and compared it to immature mouse oocyte cultured with follicular fluid from healthy women (controls patients not affected by endometriosis)