Thymosin Alpha-1 is an endogenous peptide that is originally isolated from the thymus gland and consists of 28 amino acids. Due to its immune-enhancing properties, many efforts have been made for its extraction and purification. This includes extraction from Thymosin fraction 5, which was first isolated from calf thymuses.

Tirz is a synthetic derivative of gastric inhibitory polypeptide (GIP) that has simultaneous glucagon-like peptide-1 (GLP-1) functionality as well. This combination allows Tirz to lower blood glucose levels, increase insulin sensitivity, boost feelings of satiety, and accelerate weight loss. Tirzwas developed to fight type 2 diabetes, but has additionally been shown to protect the cardiovascular system and act as a potent weight loss agent.