The reaction temperature may range from 5C to 30C, preferably 10 to 15C
The Problem with Standard Glutathione Supplements Even if you follow the "empty stomach" rule perfectly, standard glutathione supplements face a major hurdle: bioavailability

[28][29] After demonstrating its insulinotrophic properties, Dupre renamed the peptide glucose-dependent insulinotropic peptide (GIP), thus preserving the acronym.[30] Within minutes after ingestion of food, GIP is secreted from the K-cells located in the proximal region of the jejunum.[31][32][33] GIP helps maintain normal glucose homeostasis in rodent models, and has an insulinotropic effect in response to hyperglycemia in both animals and humans.[34][35][36] However, GIP does not inhibit glucagon secretion, and in fact may stimulate it during euglycemic states, and has no effect on gastric emptying.[37][38][39] Furthermore GIP concentrations in patients with type 2 diabetes are either normal, or slightly increased in response to a meal.[40][41] In patients with type 2 diabetes, GIP infusion has not been able to reduce plasma glucose concentrations, due to a lack of amplification of late phase insulin response to glucose, compared to GLP-1.[42] Thus, GIP has not been considered a suitable candidate for therapeutic development for the treatment of type 2 diabetes.[43] GLP-1 is cleaved from the proglucagon molecule by the gut specific prohormone convertase enzymes 1 and 3

If you are researching these options, the single most valuable next step is a clinical consultation not more forum posts
Benoist LBL, Vonk PE, de Vries N, Janssen H, Verbraecken J
For packages that carriers show as delivered but you don't have, report within 24 hours and Trimi will open a carrier trace