My doctor manages both my peptide use and my testosterone therapy. The testosterone side runs through a specialty pharmacy that mixes it fresh, he simply signs off on the prescription and they print the precise strength right on the label. Tirz works the same way for me, mixed to order with the exact milligram count spelled out. Whatever else I buy on the side comes from unregulated sources naturally, but those still list the peptide content clearly, so once I mix it up I still know precisely what dose I'm dealing with. Purchasing something with no dosage information at all would drive me up the wall.