bpc 157 for ankle sprain Regeneration or Risk? A Narrative Review of BPC-157 Musculoskeletal Healing Has anyone used peptides for
Description
But the per-milligram cost is almost always lower
Some peptides are designed to increase IGF-1 activity, potentially enhancing anabolic signaling in muscle tissue

Again, the question isn't "which is better?" It's "what am I trying to investigate?" If the target is a torn muscle in a study animal, a systemic (injectable) application makes sense

10.1016/S0140-6736(88)91898-3
Yes, B12 can expire
Second, not everyone needs to reach 2.4mg
