This partial sequence from human gastric protective protein BPC, which is naturally found in the human digestive tract and has been derived from human gastric juices was discovered in the 1990s by a group of scientists studying its impact mostly on gastrointestinal functions and wound healing
The benefits might be more subtle
Xenobiotica 2019;49(5):563-8
Oral glutathione supplements are not successful because the advantages are lost during the digestion interaction
Reality: The effects are not permanent and may require maintenance doses to sustain skin brightness
Zoppi S, Madrigal JL, Prez-Nievas BG, Marn-Jimnez I, Caso JR, Alou L, Garca-Bueno B, Coln A, Manzanares J, Gmez-Lus ML, Menchn L, Leza JC: Endogenous cannabinoid system regulates intestinal barrier function in vivo through cannabinoid type 1 receptor activation