Warning icon /> Please upgrade your browser.
Bottles icon

We select products for testing.

We select products based on market research of popular supplements plus a tally of votes for specific products whenever we receive direct suggestions from consumers.

Cart icon

We purchase those products.

We buy products through major retail stores and online sites, just like the everyday consumer. Labdoor does not accept samples from manufacturers for grading or ranking purposes.

Flask icon

We collect testing data.

Analytical chemistry assays are performed on samples of each product at an FDA-registered lab. Default analyses include measurements of active ingredients and potential contaminants.

Calculator icon

We convert the data into scores.

We calculate a Quality score using laboratory results and label claims from each product. Quality scores are comprised of individual scores for Label Accuracy, Product Purity, Nutritional Value, Ingredient Safety, and Projected Efficacy.

List icon

We generate rankings.

Products are ranked by overall Quality and by Value through a paired matching of Quality scores and price.

Computer icon

We publish our results.

We publish detailed reports to summarize exactly what we found in our analyses and make this information and our rankings available to you for free.