August 2026 FDA Warning Letters to Peptide Sellers: How “Research Use Only” Is Being Read
Four warning letters dated August 24, 2026 spell out when FDA treats a research-use-only peptide as an unapproved drug. The label is not the test.
Tagged
bac-water
4 notes in this topic
Lyophilization: Why Research Peptides Ship as Freeze-Dried Powder
Freeze-drying removes water by sublimation at low temperature, leaving a porous solid that resists the chemical reactions that degrade peptides in solution.
Endotoxin Testing in Peptide Quality Control
Endotoxin is the contaminant that survives sterilization. How LAL and recombinant assays detect it, and what an endotoxin result on a COA means.
Bacteriostatic Water: What It Is and Why Labs Use It
Bacteriostatic water is sterile water with 0.9% benzyl alcohol. What that preservative does, what it does not do, and how it differs from plain sterile water.
All content in the research library is educational and intended for qualified researchers. Products referenced are for laboratory research use only and are not approved for human or veterinary use. Nothing here is medical advice.