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.
Topic
Research News
Recent publications, regulatory moves and industry developments in peptide research, summarised without the hype.
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Summer 2026 Reviews Take Stock of BPC-157, TB-500 and GHK-Cu: Four Papers, One Conclusion
Between May and August 2026, four independent reviews mapped the evidence for BPC-157, thymosin beta-4/TB-500 and GHK-Cu. Their shared verdict is worth reading.
The July 2026 FDA Advisory Votes on BPC-157, TB-500, MOTS-c and Semax: What Changed and What Did Not
An FDA advisory committee recommended six peptides for the 503A compounding list in July 2026. Here is what a non-binding vote does, and does not, mean.
Two July 2026 NAD+ Trials: Raising Blood NAD+ Is the Easy Part
An NR pilot in mild cognitive impairment doubled blood NAD+ without improving cognition; an oral NAD+ formulation raised intracellular NAD+ in six days.
New July 2026 Rat Study of BPC-157 and TB-500 in Achilles Tendon Repair: What It Did and Did Not Show
A 32-rat study compared BPC-157, TB-500 and their combination after Achilles transection. TB-500 led on biomechanics; the combination was not additive.
ADA 2026: The Multi-Agonist and Oral Incretin Readouts, Summarized
ADA 2026 delivered phase 3 data on a triple GLP-1/GIP/glucagon agonist, a dual agonist, CagriSema and two oral agents. Here is the map.
Two June 2026 MOTS-c Papers Point in Different Directions: Inflammasome Suppression in Diabetic Rats, Blunted Repair in Human Stromal Cells
One June 2026 MOTS-c study found reduced cardiac inflammasome activity in diabetic rats; another found it impaired repair by human stromal cells.
FDA’s 2026 Move to Bar Bulk Compounding of GLP-1 Drugs: What It Means for Research Suppliers
In 2026 FDA moved to end bulk compounding of GLP-1 drugs and began citing research-labeled sellers of the same peptides. The two stories are one story.
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.