Tesamorelin is a 44-amino-acid GHRH analog (MW 5,135.9 Da) and the only GHRH analog with FDA approval (as Egrifta). Research-grade material is supplied as a lyophilized powder; its size and complexity make verified purity particularly important.
What to Look for When Sourcing Tesamorelin
Insist on a third-party COA (HPLC and mass spectrometry) confirming ≥98% purity and the 5,135.9 Da molecular weight. As one of the larger peptides in this category, tesamorelin is more prone to synthesis impurities, so identity verification is essential.
Typical Price Range
Research-grade tesamorelin typically runs around $40–$70 per vial depending on strength. Its larger sequence makes it costlier to synthesize than smaller peptides — unusually low prices are a warning sign.
Storage and Handling
Store lyophilized tesamorelin at 2–8°C, or frozen for long-term storage. Reconstituted peptide is dosed at bedtime in research protocols and must be refrigerated between uses.
Red Flags to Avoid
Be wary of missing COAs, purity claims without documentation, sourcing with no country of origin, and any human-use claims. Tesamorelin's FDA-approved status applies to Egrifta specifically — research-grade material is not the clinical product.
Top Recommended Source
Purgo Labs is our top-rated source based on third-party COA verification, research-grade purity, and transparent manufacturing. View at Purgo Labs.