Stated purity: A clear, written purity figure, with 99% as the baseline we expect from any serious vendor
Scalp : A different timeline entirely, covered in the hair section below
After 28 days, the bacteriostatic preservative begins losing effectiveness
Journal of Neuroscience Research, 91(10), 1296-1305
BPC-157 (Body Protection Compound-157), also designated as PL 14736, is a synthetic pentadecapeptide composed of 15 amino acids (Gly-Glu-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val) that was first isolated and identified from human gastric juice in the early 1990s
A vial left in a hot car has been outside its labeled conditions, and you cannot assess from the outside what that did to the seal