It depends on the active compound within You just mentioned a 5mg vial and a 5ml vial
Important Safety Limitations No human clinical trials
However, they do not affect opiate receptor activity nor do they alter levels of other pituitary hormones

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Although a single dedicated receptor has not been conclusively identified, experimental research indicates that BPC-157 influences several interconnected molecular systems, particularly nitric oxide signaling, angiogenic regulation, and focal adhesion associated pathways [1]
In this comprehensive guide, well break down both methods, their benefits, drawbacks, and which one might be the best fit for you