doi:10.1186/1471-244X-4-25 [63] Rybicka I, Krawczyk M, Stanisz E, Gliszczyska-wigo A
The practical takeaway: Injection = high systemic distribution tendons, ligaments, muscle, joints, vascular tissue Oral = high local GI concentration intestinal lining, gastric mucosa, gut repair Nasal = intermediate systemic delivery potential neurological targeting, emerging evidence only Injectable BPC-157: Highest Bioavailability for Systemic and Musculoskeletal Goals Injectable BPC-157 is the best-studied delivery method for healing applications outside the gastrointestinal tract
Baltimore, Md.: Johns Hopkins University Press
PMC Article PMC12446177
Another study found that vitamin B12 injections improved energy-corrected milk yield and milk solids in cows supplemented with folic acid and rumen-protected methionine, indicating that vitamin B12 might play a role in optimizing lactation performance under certain dietary conditions