l-glutathione supplement absorption Augmented Glutathione from Oral Mucosa and its Effect on Skin Pigmentation: A Clinical Review Liposomal Glutathione
Description
It also supports the immune system and acts as an antioxidant

Mice were anesthetized with 2% isoflurane mixed with 0.5 L/min 100% O 2 and placed them on the heating pad in a supine position

Phylogenetic and evolutionary analysis of functional divergence among Gamma glutamyl transpeptidase (GGT) subfamilies

And, ideally, they should have checked serum levels of the vitamins in a sample of their population to see whether they matched with reported intakes
