Glutathione is susceptible to oxidation, and exposure to light, heat, and air can degrade the active compound before you even open the bottle
Ageing Res Rev
It supports heart health and cognitive function, encourages healthy skin, strengthens immune defenses, and has been noted to increase strength and endurance
And is often referred to as its master antioxidant
In order to prevent mitochondrial malfunction and sustain metabolic function/energy generation (ATP), NAD+ supplementation may counterbalance the age-related degradation of NAD+ and its precursor nicotinamide mononucleotide by NADases, particularly CD38.7 NAD+ replenishment, however, appears to support a number of other metabolic pathways via NAD+-dependent enzymes in research involving human and animal models (as well as samples and cell lines) (1,2,3)