Reviewed by Jack Ryan, co-founder & editorial lead · Updated
COA practices 40%6.5/10
Reputation 20%5/10
Transparency 20%6.5/10
Operations 20%6.5/10
COA 40%; reputation, transparency and operations 20% each.
Direct answer
Is QC Labs legit?
QC Labs publishes a supplier-testing archive and clear US shipping terms, with a short customer track record. Its laboratory records name manufacturers or other clients, and QC Labs says own-name independent testing is in progress. No certificate is attached to current QC Labs inventory without a confirmed lot connection.
COA evidenceCOA quality 6.5/10Public COA data15 complete supplier report sets from Janoshik Analytical, Freedom Diagnostics, ILS Laboratories, Kovera Labs and HYTE Research cover identity, content and purity where applicable. The KLOW set includes endotoxin and 14-day microbial culture supplements; ILS reports include fentanyl screens, and its water report also tests pH, benzyl alcohol, endotoxin and microbial PCR.Nine retained report sets concern eligible compounds or solution; six concern excluded historical compounds. No retained report names QC Labs as client, so none attaches to a current product row. The KLOW vendor copy differs from its official primary report in certified date and omission of the original client; identity, batch and measured analytical results agree.
Purity: 99.073–99.95% across seven eligible-compound supplier reports with numerical purity; 0 of 7 below 98%. One NAD+ report measures identity/content without purity, and the solution report does not report peptide purity.
Manufacturer-supplied reports; no QC Labs-named report or confirmed current-lot attachment.
15 complete supplier report sets from Janoshik Analytical, Freedom Diagnostics, ILS Laboratories, Kovera Labs and HYTE Research cover identity, content and purity where applicable. The KLOW set includes endotoxin and 14-day microbial culture supplements; ILS reports include fentanyl screens, and its water report also tests pH, benzyl alcohol, endotoxin and microbial PCR. 99.073–99.95% across seven eligible-compound supplier reports with numerical purity; 0 of 7 below 98%. One NAD+ report measures identity/content without purity, and the solution report does not report peptide purity.
02
Current-product evidence
Nine retained report sets concern eligible compounds or solution; six concern excluded historical compounds. No retained report names QC Labs as client, so none attaches to a current product row. The KLOW vendor copy differs from its official primary report in certified date and omission of the original client; identity, batch and measured analytical results agree.
03
Company and customer history
The website identifies QC Labs LLC and founder Courtney Barber, publishes support contact details, and states that its reports are supplied by manufacturers. The exact domain was registered July 10, 2026. Seven retained reports predate that registration and name suppliers; an independent business-registry match and exact source-lot links to current QC Labs inventory have not been established. Trustpilot displays a 3.7 TrustScore from one five-star review, observed November 1, 2026. The reviewer describes helpful customer service and a package arriving a day earlier than expected; the experience date is September 21, 2026. One review provides a limited customer sample. Peptigrity lists no community reviews. No attributable Reddit or Peptide Critic customer discussion was found in the bounded searches.
04
Shipping, payments and returns
QC Labs publishes $15 FedEx 2 Day shipping, free at $250, after 1–2 business days of processing. It ships only to verified laboratory addresses in the United States. Its FAQ lists manual Venmo and Zelle payments; card and Apple Pay checkout are pending business verification. Unopened items may be returned within seven days. Damaged, missing or incorrect orders reported within seven days qualify for replacement or refund including shipping. Independent identity or purity failures can be raised within 30 days.
Details
Payment methods
Payment methods not verified
Shipping
QC Labs publishes $15 FedEx 2 Day shipping, free at $250, after 1–2 business days of processing.
It ships only to verified laboratory addresses in the United States.
Its FAQ lists manual Venmo and Zelle payments; card and Apple Pay checkout are pending business verification.
Reviews
No PeptidePrices reader reviews yet.
Trustpilot displays a 3.7 TrustScore from one five-star review, observed November 1, 2026.
Review evidence
The reviewer describes helpful customer service and a package arriving a day earlier than expected; the experience date is September 21, 2026.
One review provides a limited customer sample.
Peptigrity lists no community reviews.
No attributable Reddit or Peptide Critic customer discussion was found in the bounded searches.
QC Labs publishes a supplier-testing archive and clear US shipping terms, with a short customer track record. Its laboratory records name manufacturers or other clients, and QC Labs says own-name independent testing is in progress. No certificate is attached to current QC Labs inventory without a confirmed lot connection. Our rating: 6/10. Affiliate links never affect the score.
Does QC Labs have a coupon code?
QC Labs lists code PEPTIDEPRICES for 5% off. PeptidePrices has not confirmed the discount in a customer checkout.
Where does QC Labs ship?
QC Labs ships to Verified US laboratory addresses. QC Labs publishes $15 FedEx 2 Day shipping, free at $250, after 1–2 business days of processing. It ships only to verified laboratory addresses in the United States. Its FAQ lists manual Venmo and Zelle payments; card and Apple Pay checkout are pending business verification.
Does QC Labs publish COAs?
Public COA data. Manufacturer-supplied reports; no QC Labs-named report or confirmed current-lot attachment.
What do customer reviews say about QC Labs?
Trustpilot displays a 3.7 TrustScore from one five-star review, observed November 1, 2026. The reviewer describes helpful customer service and a package arriving a day earlier than expected; the experience date is September 21, 2026. One review provides a limited customer sample. Peptigrity lists no community reviews. No attributable Reddit or Peptide Critic customer discussion was found in the bounded searches.
Do QC Labs reports identify QC Labs as the tested client?
The retained reports identify suppliers, other brands or an individual client. QC Labs describes them as manufacturer-provided batch reports and says own-name testing is in progress.
How much does QC Labs shipping cost?
The published US policy lists $15 FedEx 2 Day shipping, free at $250, with 1–2 business days for processing and two business days for delivery.
