Quick answer: In the Phase 2 clinical trial (Jastreboff et al., 2023, New England Journal of Medicine ), retatrutide was given by once-weekly subcutaneous injection across a 112mg range
Nothing here implies weight-loss efficacy in people
BPC-157 is primarily investigated for its effects on angiogenic and NO-mediated signaling
As far as tested athletes are concerned - BPC is not currently on the WADA banned list under the section naming peptide hormones, growth factors, related substances, and mimetics (as of October 2020)
Hydroxocobalamin is a natural form of Vitamin B-12 that can be administered via injection to improve energy levels, aid in red blood cell development and help maintain a healthy central nervous system
116:109741 Thymosin beta-4 and peptide-mediated cellular signaling pathways Dou Y, Lee A, Zhu L, Morton J, Ladiges W., Aging Pathobiology and Therapeutics , 2020