Yes, glutathione is effective for skin lightening in both men and women
This creates a synergistic effect the supplemental glutathione provides direct antioxidant support, while Milk Thistle helps your liver preserve and recycle it
Jungas T, Motta I, Duffieux F, Fanen P, Stoven V, Ojcius DM
Antioxid Redox Signal 15:15831606 Ray PD, Huang B-W, Tsuji Y (2012) Reactive oxygen species (ROS) homeostasis and redox regulation in cellular signaling
However, because you are often exposed to free radicals, heavy metals, sunlight, caustic elements and other unfavorable factors, your skin color will gradually change back to its original color after a period of time
Wear protective clothing, hats and eyewear when exposed to the sun in addition to sunscreen