Buying reduced glutathione looks simple until a batch fails your QC. After shipping this ingredient to cosmetic and supplement brands for years, we have a short checklist that separates reliable suppliers from risky ones.
1. Verify the Form on the CoA
Insist the certificate specifies “reduced” glutathione with assay 98%+. Oxidized material is sometimes relabeled. The CoA should show the exact lot, not a catalog average.
2. Ask About Cold-Chain Experience
Glutathione is temperature sensitive. A supplier who has shipped it to your region in summer without complaints has already solved the hard part. Request references or photos of their packing.
3. Confirm Certifications Are Current
Halal, Kosher, and ISO documents expire. Check issue dates. We renew ours annually and keep scanned copies ready on request.
4. Sample Before Bulk
A 5-10 g sample tested in your own lab costs little and prevents a container-level loss. We ship samples within two working days.
Buyer FAQ
What minimum order keeps unit price reasonable?
Below 1 kg the per-gram price climbs steeply; 1-5 kg is the sweet spot for most brands.
How do I know the supplier is not reselling traded goods?
Ask for the manufacturer relationship or a declaration of origin. Direct sourcing gives you traceability a trader cannot.