Can I mix multiple peptides in the same syringe or should I inject them separately?

It is generally recommended to administer peptides separately unless explicitly advised otherwise by a healthcare provider. Mixing peptides in the same syringe can cause interactions between their molecular charges, potentially leading to aggregation, precipitation, or destabilization that renders them ineffective. Some peptides with similar pH and solubility profiles (such as BPC-157 and TB-500) may be compatible, but PEGylated peptides, GLP-1 agents, and oil-based formulations should always be injected separately.