rectal glutathione High Potency 500mg Reduced L-Glutathione (Setria Brand) + Probiotic Suppository. Maximum Bioavailable Formulation with Powerful Antioxidant Properties. : Health & Household High Potency 500mg Reduced L-Glutathione

It doesn't really taste like anything except slightly salty, but it didn't deliver solid, consistent sleepy results like other picks above

CPC delivers all of the above: Fully licensed peptide manufacturer Extensive experience in peptide synthesis Advanced synthesis technology Batch-specific testing: HPLC & Mass Spectrometry Certificate of Analysis (COA) provided Small research quantities Bulk and wholesale orders available Temperature-controlled packaging Reliable delivery to the USA and worldwide Product Name: GHK-CU Purity: 99% (research grade) Form: Lyophilized powder Testing: HPLC / Mass Spectrometry Packaging: Sealed research vials Documentation: COA available GHK-CU is widely used in: Cellular repair and regenerative biology studies Tissue and skin research models Pharmaceutical formulation and testing In-vitro laboratory investigations Researchers choose CPC for consistent quality and reproducible results

Saftig P, Klumperman J

Reported side effects are rare and mild: Localized irritation or redness at injection site