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Research indicates that Thymosin Beta-4 can accelerate healing by 50%, while BPC-157 has been linked to a 300% increase in new blood vessel formation at surgical sites

Some users alternate between the affected shoulder area and a systemic site like the abdomen, reasoning that both local and systemic administration provide benefit

What changes is accumulated risk and your ability to justify the vial

Link to my Substack is in the comments for a more detailed discussion

The reason there is no single "winner" brand is that copper peptide serums vary along several axes at once concentration, chelation form, pH, texture, supporting ingredients and price