The more efficient conjugation of the QIs to GSH may have reduced covalent modification of cellular macromolecules, like ER proteins Grp78/Bip (Xu et al., 2015), microsomal GST (Weis et al., 1992), and PDI (Liu et al., 2005)
Cysteine is mainly derived from the trans-sulfuration pathway of methionine and the reduction of cysteine [21]
In addition to its ability to reduce pigmentation, treat melasma, & improve skin glow & luminosity, glutathione offers several other benefits for skin health: Photoprotective role, UV Protection: Research suggests that glutathione provides protection against UV radiation, a known contributor to skin damage and the risk of skin cancer
Other than the price I highly recommend this product if you can afford it
Brightening Boost : Enriched with Vitamin C, it helps to brighten dull skin, even out your complexion, and enhance your skins natural glow while protecting against environmental damage