Where to buy GLP-1 (2026)
A gut incretin hormone that raises insulin in a glucose-dependent way, lowers glucagon, increases fullness, and slows digestion, forming the basis of leading type 2 diabetes and obesity drugs.
#1 Serum Research Featured partnerAffiliated · disclosure | #2 BioChain USA | #3 Nootropics Depot | |
|---|---|---|---|
| Score | 9.6/10 | 9.5/10 | 9.5/10 |
| COA | ✓ Yes | ✓ Yes | ✓ Yes |
| Country | USA | USA | USA |
| Why we rate it | Full per-batch COAs on every product and competitive pricing, from our affiliated partner — labeled as such wherever it appears. | Published per-batch COAs, third-party testing, and a risk-free guarantee from a US-only shipper. | Operates at a global scale with a high degree of transparency, and earns praise for its customer support and logistics. |
| Check prices at Serum Research →Read review → | Check prices at BioChain USA →Read review → | Check prices at Nootropics Depot →Read review → |
How we picked these suppliers
Every supplier above publishes third-party certificates of analysis we've checked, and ranks at the top of our independent scoring across 209 vendors — based on COA transparency, lab testing, and community reputation. Rankings are never sold; see our methodology. Before any purchase, verify the current per-batch COA for the exact product you're buying.
Quick facts for GLP-1: typical research dose 0.25 mg · evidence grade A+ · primary use: Weight Loss. Read the full GLP-1 guide, the reconstitution & dosing notes, or run the numbers in the dose calculator.
For informational and research purposes only. Not medical advice. Products referenced are sold for laboratory research use only and are not for human consumption.