Step One Lab Results
Step One has 121 published certificates of analysis covering 45 product sizes, tested by Freedom Diagnostics, ILS Laboratories, Kovera Labs and Vanguard Laboratory. The latest is GLP-2T 140mg, tested October 21, 2026, at printed aggregate: 99.97% purity.
45 Step One Certificates of Analysis
GLP-2T
- 10mg6 tests passed: Purity, Identity, Endotoxins, Bioburden, Heavy Metals, Fentanyl Screen·99.95%11.95 mg
- 30mg6 tests passed: Purity, Identity, Endotoxins, Bioburden, Heavy Metals, Fentanyl Screen·99.87%30.85 mg
- 60mg6 tests passed: Purity, Identity, Endotoxins, Bioburden, Heavy Metals, Fentanyl Screen99.86%61.99 mg
- 140mg5 tests passed: Purity, Identity, Endotoxins, Bioburden, Heavy Metals·printed aggregate: 99.97%138.58 mg
GLP-3R
- 10mg6 tests passed: Purity, Identity, Endotoxins, Bioburden, Heavy Metals, Fentanyl Screen·99.78%11.15 mg
- 20mg6 tests passed: Purity, Identity, Endotoxins, Bioburden, Heavy Metals, Fentanyl Screen·99.85%21.00 mg
- 30mg6 tests passed: Purity, Identity, Endotoxins, Bioburden, Heavy Metals, Fentanyl Screen·99.78%31.03 mg
- 60mg6 tests passed: Purity, Identity, Endotoxins, Bioburden, Heavy Metals, Fentanyl Screen·99.87%60.57 mg
- 100mg6 tests passed: Purity, Identity, Endotoxins, Bioburden, Heavy Metals, Fentanyl Screen·99.93%101.73 mg
Questions about Step One
PeptiPrices indexes 121 published certificates of analysis from Step One, covering 45 product sizes.
Freedom Diagnostics, ILS Laboratories, Kovera Labs and Vanguard Laboratory.
Yes. Its published certificates come from Freedom Diagnostics, ILS Laboratories, Kovera Labs and Vanguard Laboratory, independent testing labs.
Step One's published certificates cover Purity (42 sizes), Identity (34 sizes), Endotoxins (36 sizes), Sterility (2 sizes), Bioburden (34 sizes), Heavy Metals (35 sizes) and Fentanyl Screen (32 sizes).
Yes. 34 tested sizes have an Identity test, including GLP-2T 140mg, MOTS-c 40mg and GLP-3R 20mg.
Yes. 36 tested sizes have an Endotoxin test, including GLP-2T 140mg, MOTS-c 40mg and GLP-3R 20mg.
Yes. 2 tested sizes have a Sterility test, including 5-Amino-1MQ 50mg and GLP-1S 30mg.
Yes. 34 tested sizes have a Bioburden test, including GLP-2T 140mg, MOTS-c 40mg and GLP-3R 20mg.
Yes. 35 tested sizes have a Heavy Metals panel, including GLP-2T 140mg, MOTS-c 40mg and GLP-3R 20mg.
Yes. 32 tested sizes have a Fentanyl screen, including GLP-3R 20mg, GLP-3R 30mg and KLOW 50mg+10mg+10mg+10mg.
Step One's published certificates report between 95.65% and 99.98% purity across 39 tested sizes.
GLP-2T 140mg, tested by Freedom Diagnostics on October 21, 2026, reported printed aggregate: 99.97% purity and 138.58 mg measured content.
Yes. 10mg at 99.78% purity (Freedom Diagnostics, September 3, 2026); 20mg at 99.85% purity (Freedom Diagnostics, September 18, 2026); 30mg at 99.78% purity (Freedom Diagnostics, September 18, 2026); 60mg at 99.87% purity (Freedom Diagnostics, August 16, 2026); 100mg at 99.93% purity (Freedom Diagnostics, August 28, 2026).
Yes. 10mg at 99.95% purity (Freedom Diagnostics, September 16, 2026); 30mg at 99.87% purity (Freedom Diagnostics, August 26, 2026); 60mg at 99.86% purity (Freedom Diagnostics); 140mg at printed aggregate: 99.97% purity (Freedom Diagnostics, October 21, 2026).
Yes. 10mg at 99.68% purity (Freedom Diagnostics, August 24, 2026); 40mg at printed aggregate: 99.79% purity (Freedom Diagnostics, October 21, 2026).