is ipamorelin a selective ghrp Figure 3 from Ipamorelin, the first growth hormone secretagogue Ipamorelin vs GHRP-2 vs GHRP-6:

While Vitamin C is a potent immunity enhancer, it is also known to improve collagen synthesis in the body

doi: 10.1016/j.molcel.2023.11.040 6 LambrechtBNAhmedEHammadH

the human clinical evidence is too thin to meet the FDA efficacy bar

[5] [6] However, retatrutide remains an investigational compound and has not been approved by the Medicines and Healthcare products Regulatory Agency (MHRA) or the European Medicines Agency (EMA) for any clinical use

Clin Cosmet Investig Dermatol 10:147153 Arjinpathana N, Asawanonda P (2012) Glutathione as an oral whitening agent: a randomized, double-blind, placebo-controlled study