Peptide Sciences
[glsr_summary assigned_posts="35" hide="bars"]
Editorial Overview
Formerly the largest US peptide supplier. Shut down March 2026 amid purity concerns (some batches testing as low as 75%). Profile kept for historical reference.
Lab Test Results + Submit a result
No lab results have been submitted for Peptide Sciences yet.
Have an HPLC or mass spec result? Submit it and help the community verify product quality.
Submit a Lab Result →Community Reviews
[glsr_summary assigned_posts="35" schema="true"]
💡 Helpful reviews include: the specific product and peptide, batch/lot number if visible on the label, how long shipping took, and a photo of your order if possible.
[glsr_reviews assigned_posts="35" per_page="10" schema="true"]
Share Your Experience
Your review helps buyers make safer, more informed decisions. Be specific — it makes a real difference.
[glsr_form assign_to="35"]
Reviews represent personal experiences and opinions of community members. Peptide Black Book does not verify purchase claims. All content is for informational purposes only and does not constitute medical advice.
Read our methodology →