Oliva-Vilarnau, N., Vorrink, S
All are PLP-containing enzymes and include (1) the cytosolic enzymes kynureninase, GTK/KAT I, cytosolic aspartate aminotransferase (cytAspAT), glutamine transaminase L (GTL)/KAT III, alanine aminotransferase (AlaAT), and cytosolic branched-chain aminotransferase (BCAT c ) and (2) the mitochondrial enzymes mitochondrial aspartate aminotransferase (mitAspAT), mitochondrial branched-chain aminotransferase (BCAT m ), alanine-glyoxylate aminotransferase isozyme II (AGAT II), and GABA aminotransferase (reviewed by Cooper and Pinto, 2006, Cooper and Pinto, 2008, Cooper et al., 2011)

Consumer Results Overall Skin Condition: 93% noticed skin looked renewed* 84% saw that skin looked more toned* Advanced Claims: 89% noticed an improvement in lines and texture* 86% felt firmer, tighter skin* 86% saw an improvement in expression lines* 84% saw that wrinkles were smoothed* 83% noticed creases appeared shallower and forehead lines appeared smoother* 82% saw tighter-looking skin* 80% saw lines smoothed around the mouth and lips* 79% noticed engraved imperfections appeared shallower* 77% noticed that skin looked lifted* 74% felt that skin looked dramatically younger* 73% saw that deep-set wrinkles, including marionette lines and nasolabial folds were smoothed* *In a consumer study of 102 women after 28 days Acyl-Glutathione: The Master Antioxidant Comprised of 3 amino acids, glutathione is the body's main antioxidant and as part of a comprehensive skincare regimen can help to reduce the look of wrinkles and creases by replenishing fragile skin

There isnt a clearly defined cycle needed (unlike some therapies that require breaks)
Basel, Switzerland: MDPI: 185