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
This synergy supports radiant, elastic, and hydrated skin appearance, forming a strong foundation for experimental use in rejuvenation and aesthetic restoration research
doi:10.1016/j.cpr.2018.05.006 Palmer CA, Alfano CA
Apostolopoulos V, Bojarska J, Chai TT, Elnagdy S, Kaczmarek K, Matsoukas J
doi: 10.1007/s11120-023-01016-y 69 KrynickV.SkotnicovP.JacksonP
Notably, cell shrinkage and membrane blebbing are the most characteristic morphological signs of apoptotic cells [87,88,89]