curalabs bpc 157 BPC-157 CAPS/VIAL SET - Research with Pure, Quality Standards BPC-157 Peptide | Research Compound

For hair specifically, topical application directly to the scalp is the most studied route and concentrates the peptide where you want it

However, they are not normally considered DME

Adults need 2.4 micrograms of vitamin B12 daily, according to the National Institutes of Health Office of Dietary Supplements

Therefore, you need to get it from your diet (food sources) or dietary supplements in order to make enough red blood cells and other important functions

So the practical takeaway is not oral is better or SC is better. It is: pick one route, follow the documented per-dose figure for the vial you have, and keep the route constant so that whatever you observe is not confounded by a mid-stream route change