Yes, you do need a prescription for peptide therapy
TB-500 is a fragment analog, not the complete thymosin beta-4, and acts intracellularly on G-actin rather than via a surface receptor
However, the source records reviewed for this article contained conflicting pricing figures for this program that this article could not resolve or verify as a single, reliable total - so rather than repeat a number that may not match what you're actually quoted, this article doesn't restate that figure here
Not all bacteriostatic water is created equal
How much bacteriostatic water do I mix with a BPC-157 + TB-500 vial
If company history, manufacturing standards, and industry reputation factor into your decision-making alongside product-specific claims, that longevity is relevant