Best Glutathione Supplement: What's Your Best Option? GoodRx Optimal Health Systems Essential Glutathione 20 Effervescent Wafers TheNatural Gluta Yuth Liposomal Japanese L Glutathione Opitac 500 mg Capsule: Buy bottle of 30.0 capsules at in India 1mg Supplements Glutathione 500mg Whole Food Enriched Antioxidant The best glutathione supplement is the one that works for your body. Sounds simple, doesn't it? But regular, run of the mill oral glutathione is only absorbed by the body at about 3 5%