For systemic tissue repair (tendons, ligaments, joints), subcutaneous injection is more reliable for both peptides
You can follow every storage and reconstitution guideline to the letter, but if the peptide wasn't pure or properly synthesized to begin with, its stability will be compromised from day one
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However, the frequency of these injections depends on individual needs and the recommended dosage
Peptide purity, accurate labelling and reliable logistics directly affect whether experimental results are reproducible and imported research chemicals frequently arrive with none of those assurances, and with customs delays or seizures on top
In research discussions, GHK-Cu and BPC-157 are often viewed as complementary because they are commonly chosen for different tissue priorities