is glutathione good for dark skin Brightening from Within: How Naturally Reduces Hyperpigmen – Setu Nutrition Top 8 Glutathione Rich Foods

It is now the most advanced and effective way of increasing essential endogenous antioxidant levels

Potzner MR, Griffel C, Lutjen-Drecoll E, Bosl MR, Wegner M, Sock E (2007)

The combination achieved 20.4% mean body weight reduction from baseline to week 68 (22.7% under the trial product estimand that accounts for discontinuation)

For example, a small pilot study might suggest benefits, but without larger, randomized controlled trials, these results are not reliable

Depletion of glutathione

If you are weighing the two, see the dedicated comparison of KLOW vs GLOW vs Wolverine peptide blends and the primer on what the KLOW peptide blend is