10 Consequently, many clinicians have avoided the direct use of GSH supplements and instead focused on GSH precursors, such as N-acetylcysteine, to boost endogenous production.* 11 However, in 2015, a clinical study of pure powdered glutathione increased erythrocyte, plasma, and lymphocyte glutathione levels after six months of use in humans, suggesting that some is absorbed after all.* 12 Finally, an oral glutathione that increases blood levels 2.5 times more than other forms
Endocrine Reviews, 25 (3), 426457.
Higher-strength blends often become easier for beginners to measure with 2 mL because the per-unit concentration is less compressed
Walter FR, Harazin A, Tth AE, Veszelka S, Santa-Maria AR, Barna L, Kincses A, Bicz G, Balla Z, Kui B, Malth J, Cervenak L, Tubak V, Kittel , Rakonczay Z Jr, Deli MA