Biosci Rep (2019) 39(1):BSR20180890
The inner thigh can be more muscular or have less accessible fatty tissue depending on your body composition, making it harder to ensure the needle stays in the correct subcutaneous layer
Back Mojsov, S, Weir, GC, Habener, JF (Feb 1987) 'Insulinotropin: glucagon-like peptide I (7-37) co-encoded in the glucagon gene is a potent stimulator of insulin release in the perfused rat pancreas', Journal of Clinical Investigation , 79, 616-19
Indeed, it is known that the enzyme -glutamyltranspeptidase (GGT) on the external cell membrane initiates this process (called the -glutamyl cycle) [12, 50, 51]