Here's a full breakdown: Purity Tested Peptides: Limitless Life offers research peptides, like TB-500, which have been purity tested by third-party labs
This is determined by the presence of a molecule called the intrinsic factor that is essential for the absorption of B12 into your system
(PubMed) Zhao M, Wu G, Li Y, et al
Some people, however, may have an allergy or other intolerance to the peptide, resulting in severe reactions like hives , swelling , and difficulty breathing
The peptide dosage calculation guide walks through these volume tradeoffs in more detail, and the syringe dosage conversion chart gives you a visual reference for reading your syringe correctly