There are, however, two studies that we can call on: Pentadecapeptide BPC 157 Interactions with Adrenergic and Dopaminergic Systems in Mucosal Protection in Stress (link) This study wasnt designed to find the comparison between two administration methods, but it did look at how different systems of the body would affect these two methods
Crop Sci 48(3):11401146 Katiyar-Agarwal S, Agarwal M, Grover A (2003) Heat-tolerant basmati rice engineered by over-expression of hsp101
Glutathione is a powerful antioxidant composed of three amino acids: cysteine, glutamate, and glycine
In clinical trials of semaglutide injection for weight management, patients treated with semaglutide had a mean increase from baseline in amylase of 16% and lipase of 39%
But it's important to note that dietary glutathione through specific foods is not easily available due to digestive enzymes breaking it down into amino acids
Research on the cosmetic effects of all IV infusions is limited