Frontiers Glutathione: Pharmacological aspects and implications for clinical use in non alcoholic fatty liver disease Oral supplementation with liposomal glutathione elevates body stores of glutathione and markers of immune function European Journal of Clinical Nutrition Sublingual Vs. Oral Sublingual is more efficient Sublingual has zero barriers Sublingual has higher bioavailability Sublingual has faster absorption Glutathione, The supplement you didn't know you needed.