Quick Answer: The best way to absorb glutathione is through liposomal delivery, which uses a protective fatty shell to bypass digestion
Functional medicine at our core treating the whole person, not just the injury
10.1155/2020/9547127 152 ThackerayJ
10.1371/journal.pone.0146797 Summary Keywords autism, folinic Acid, glutathione, methylation, methylcobalamin, oxidative stress, tetrahydrobiopterin Citation Delhey LM, Tippett M, Rose S, Bennuri SC, Slattery JC, Melnyk S, James SJ and Frye RE (2018) Comparison of Treatment for Metabolic Disorders Associated with Autism:Reanalysis of Three Clinical Trials
This is a genuinely clinical evidence base but it is phase-2/phase-3 investigational data, not a finished, approved product