Thymosin Alpha-1 is a 28-amino-acid immune-modulating peptide (MW 3,108.4 Da) supplied as a lyophilized powder for research. Because it is the same molecule as the approved drug Zadaxin, verified purity and identity matter especially for reproducible immune-modulation research.
What to Look for When Sourcing Thymosin Alpha-1
Require a third-party certificate of analysis (HPLC and mass spectrometry) confirming ≥98% purity and the correct 3,108.4 Da molecular weight. It should ship as a lyophilized powder in sealed, labeled vials from a US-based manufacturer with a verifiable address.
Typical Price Range
Research-grade Thymosin Alpha-1 typically runs around $50–$60 per vial. Because it is a larger, more complex peptide, prices far below market often indicate underdosed or impure material.
Storage and Handling
Lyophilized Thymosin Alpha-1 is stable at 2–8°C and tolerates brief room-temperature periods during shipping. Once reconstituted with bacteriostatic water, refrigerate it and use within the vendor's stated stability window.
Red Flags to Avoid
Avoid vendors with no COA or a COA from an unaccredited lab, vague sourcing, claims of FDA approval or human-use authorization, or prices well below market. For an immune-active peptide, verified identity and purity are non-negotiable.
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.