Real Peptides publishes COAs for every batch on our website before sale, listing the exact purity (typically 98-99%+), the testing laboratory name, and the test date
Basdevant, Nutritional deficiency after gastric bypass: diagnosis, prevention and treatment, Diabetes & Metabolism, Volume 33, Issue 1, February 2007, Pages 13-24, ISSN 1262-3636, Eussen SM, de Groot LM, Clarke R, et al

Storage and handling Before reconstitution (powder) Storage : Refrigerate at 2-8C (36-46F) Shelf life : 2-3 years when properly stored Stability : Very stable as lyophilized powder Travel : Can survive room temperature for short periods (days) After reconstitution (liquid) Storage : Refrigerate immediately at 2-8C Shelf life : 28 days with bacteriostatic water Stability : Degrades over time, use within 28 days Travel : Keep cold (use cooler with ice packs) Light : Protect from direct light (store in box) Handling tips Always use clean technique Don't contaminate vial top Use new needle each time Don't freeze Don't shake vigorously Mark reconstitution date on vial Common mistakes with 5mg vials Using wrong water Mistake : Using sterile water instead of bacteriostatic water
What are nutraceuticals
For the bigger picture, read how peptide therapy is supervised at Perfect B in Doral and where a specific peptide fits within a complete treatment plan
Should your level come back low, the follow-up question becomes what's causing it