PeptiPrices indexes 34 published certificates of analysis from Bulk Peptides, covering 19 product sizes.

Chromate, Freedom Diagnostics and Vanguard Laboratory.

Yes. Its published certificates come from Chromate, Freedom Diagnostics and Vanguard Laboratory, independent testing labs.

Bulk Peptides' published certificates cover Purity (18 sizes), Identity (16 sizes), Endotoxins (15 sizes), Sterility (3 sizes), Bioburden (11 sizes), Heavy Metals (14 sizes) and Fentanyl Screen (11 sizes).

Yes. 16 tested sizes have an Identity test, including Glutathione 600mg, Oxytocin 5mg and BPC-157 10mg.

Yes. 15 tested sizes have an Endotoxin test, including Glutathione 600mg, BPC-157 10mg and BPC-157/TB-500 5mg+5mg.

Yes. 3 tested sizes have a Sterility test, including TB-500 10mg, GLOW 50mg+10mg+10mg and HCG 5000iu.

Yes. 11 tested sizes have a Bioburden test, including BPC-157 10mg, BPC-157/TB-500 5mg+5mg and DSIP 5mg.

Yes. 14 tested sizes have a Heavy Metals panel, including Glutathione 600mg, BPC-157 10mg and BPC-157/TB-500 5mg+5mg.

Yes. 11 tested sizes have a Fentanyl screen, including BPC-157 10mg, BPC-157/TB-500 5mg+5mg and DSIP 5mg.

Bulk Peptides' published certificates report between 99.07% and 99.99% purity across 17 tested sizes.

Glutathione 600mg, tested by Freedom Diagnostics on October 24, 2026, reported printed aggregate: 99.91% purity and 619.36 mg measured content.

Yes. 10mg at 99.92% purity (Freedom Diagnostics, September 23, 2026); 20mg at 99.94% purity (Freedom Diagnostics, September 23, 2026).

Yes. 20mg at 99.96% purity (Chromate, November 23, 2025).

Yes. 5mg at 99.25% purity (Freedom Diagnostics, September 5, 2026); 10mg at 99.96% purity (Freedom Diagnostics, September 23, 2026).