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Most of these effects appear to outperform placebo

However, researchers have identified several indirect mechanisms through which BPC-157 could theoretically support the conditions necessary for healthy testosterone production: The Bottom Line BPC-157 supports the biological systems that keep testosterone production healthy vascular integrity, inflammation control, tissue repair, and potentially gut-brain-gonad signaling

The product should be formulated to minimize exposure to destabilizing agents, such as strong acids or excessive heat

With that in mind here are the injection sites you can use on your body for B12 shots: Mid-thigh (right into your quadriceps): This is the preferred site if you are self-injecting