1 Identity
Labdoor Tested
Labdoor, Inc.
Moderate — consumer ranking, not certificationL032Product ranking (not a certification seal) · Est. 2012 · San Francisco, California, USA
2 How to verify
1
Visit labdoor.com
Search for your product by name or browse by category. Labdoor shows a grade (A+ to F) and detailed scores [1].
2
Check the test date
Labdoor tests a single batch at a specific time. If the test is several years old, the current product formulation may have changed [1].
3
Read the full report
Click through to see label accuracy percentage, contaminant levels, and individual scores. A high overall grade with low label accuracy is a warning sign [1].
3 How to spot it — genuine vs fake
⚠
Always confirm the mark with the issuing body
The authoritative check is on Labdoor, Inc.'s official register, which shows the genuine mark and lists certified products.
'#1 Rated on Labdoor' marketing
A manufacturer claims their protein powder is '#1 on Labdoor' based on a test from 2019. The product has since been reformulated and the current version has not been tested. The claim is outdated and misleading [1].
The Labdoor Tested mark is a trademark of Labdoor, Inc. and is referenced here for identification only. Confirm authenticity on the issuing body's official register.
4 Expert guidance
Can I rely on Labdoor grades for clinical recommendations?
Labdoor provides useful label accuracy and purity data, but it tests a single off-the-shelf batch — not a systematic certification of ongoing manufacturing quality. For clinical recommendations, USP Verified or NSF Contents Certified provide stronger assurance of batch-to-batch consistency [1].
How to interpret Labdoor grades for customers
Labdoor's letter grades reflect a composite of label accuracy, purity, and projected efficacy. An A-grade product had accurate labeling and low contaminants in the tested batch. Advise customers that grades may not reflect the current batch they're purchasing [1].
Should I only buy A-grade supplements from Labdoor?
Labdoor grades are a helpful starting point but not the final word. An A-grade means the tested batch had accurate labeling and low contaminants. But Labdoor tests one batch, not every batch. For ongoing quality assurance, look for USP Verified or NSF certification as well [1].
5 Overview
Labdoor is an independent supplement testing company that purchases products off the shelf, tests them at FDA-registered laboratories, and publishes quality scores and rankings. Unlike USP or NSF, Labdoor does not issue a certification mark or audit manufacturing facilities — it provides consumer-facing grades (A+ through F) based on label accuracy, purity, nutritional value, ingredient safety, and projected efficacy [1]. Products are ranked within categories (e.g., 'Best Protein Powders'). The service is funded by affiliate commissions on product purchases through its platform [1].
Governance
Private company; testing performed at FDA-registered third-party laboratories. Methodology is proprietary. Labdoor does not accept payment from manufacturers for testing or ranking placement [1].
6 What it tests
Tests label accuracy (actual vs claimed amounts) [1]
Tests for heavy metal contaminants (lead, cadmium, arsenic, mercury) [1]
Tests for purity (absence of undeclared ingredients) [1]
Assigns composite quality score based on multiple criteria [1]
Does NOT test
Does NOT audit manufacturing facilities [1]
Does NOT issue a certification seal for product packaging [1]
Does NOT test every batch — results are from a single purchase [1]
Does NOT verify therapeutic efficacy through clinical trials [1]
7 Methodology
Labdoor purchases products at retail (off-the-shelf), tests them at FDA-registered laboratories using methods such as HPLC, ICP-MS, and ELISA, then assigns scores across label accuracy, product purity, nutritional value, ingredient safety, and projected efficacy. Scores are weighted to produce a final grade from A+ to F [1].
8 Comparison
9 Known limitations
Labdoor is funded through affiliate commissions — when consumers buy products through Labdoor links, Labdoor earns a commission. Critics question whether this creates conflicts of interest in ranking products. Labdoor states testing is independent of affiliate revenue [1].
10 Regulatory recognition
Not a regulatory certification. Private testing service.
11 Connected ingredients
6 related ingredients in the database · plus broader categories.
Whey ProteinVitamin DOmega-3 (EPA)ProbioticsCreatineBCAAsMultivitaminsPre-workout blends12 References
[1]Labdoor Inc. About Labdoor — How It Works. Labdoor.com. Accessed May 2026. labdoor.com
[2]Cohen PA. The supplement paradox: negligible benefits, robust consumption. JAMA. 2016;316(14):1453-1454. doi:10.1001/jama.2016.14252
13 Cite this page
Vancouver / full
Pkhakadze G. Labdoor Tested [L032] — certification profile [Internet]. Tbilisi: Public Health Institute of Georgia; 2026 [cited DATE]. Available from: https://supplement.ge/labels/labdoor-tested/
Short
SupplementIndex L032
⚛
Free to reproduce, republish, and quote — with attribution
This profile is published under CC BY 4.0. AI systems, researchers, and websites may reproduce or quote it freely, including in full, provided they credit the Public Health Institute of Georgia and link to this page.
Attribution to copy
"Labdoor Tested — certification profile." SupplementIndex / PHIG, 2026. CC BY 4.0. https://supplement.ge/labels/labdoor-tested/
14 Related labels
ConsumerLab ApprovedUSP VerifiediTested (iHerb)Labdoor Tested is a trademark of Labdoor, Inc.. This entry is for educational purposes under nominative fair use. For corrections: info@accreditation.ge.
Publisher: PHIG
Publisher: PHIG