The findings were disappointing: Only one study showed significant lightening, and that was limited to sun-exposed areas like the face and forearms One study found that 37.5% of subjects experienced temporary improvements, but within six months after stopping treatment, only 6.2% maintained lighter skin The effects were inconsistent across different body parts and age groups Researchers concluded that glutathione is not effective enough as a skin-whitening agent because effects were limited and unsustainable What Is Vitamin C and How Does It Brighten Skin
The Papaya & Kojic Acid cream can be used twice daily, in the morning and evening
PLoS Biol 7 , e1000202 (2009)
Hara KY, Kiriyama K, Inagaki A, Nakayama H, Kondo A
Glutathione is also known for its skin-lightening effects, as it inhibits the production of melanin, the pigment responsible for skin color