niacinamide or glutathione APLB - Facial Cream Contains 50 ONE THING Niacinamide Glutathione Cream,

Curr Opin Cell Biol 2004

If your liver is overworked or lacks the necessary antioxidants to function efficiently, it can lead to what some call "oxidative burden." This internal stress often shows up on the skin as dullness, uneven tone, or increased sensitivity

Membrane potential by DiOC2(3) (3,3-Diethyloxacarbocyanine Iodide)

It inhibits tyrosinase, the enzyme that produces melanin

Though this method is not typically used to measure cytokine levels as compared to the more common plasma measurements, it can be an important method of measure due to the short half-life of cytokines and their localization in production, thus many studies have utilized this alternate method (Sullivan et al., 2000