why reduced glutathione Disulfide - an overview Reduced Glutathione VS L Glutathione:

A systematic review of the risk of non-alcoholic fatty liver disease in women with polycystic ovary syndrome

Because it contains sulfur, it often smells slightly like eggs

doi: 10.1002/jcp.28721 228 SwalesCAthanasouNAKnowlesHJ

The combination itself has not been validated in controlled human trials

Advantages 500 mg reduced glutathione per serving Physiologically active GSH form Supports the endogenous antioxidant network Supports liver detoxification and cellular energy Free from wheat, gluten, soy, dairy, egg, fish/shellfish, peanuts/tree nuts or sesame Other Ingredients Capsule (hydroxypropylmethylcellulose, water), microcrystalline cellulose, magnesium stearate (vegetable source) and silicon dioxide

This provides a middle ground between purely systemic and directly local administration