Membership status
Members agree to independent testing, with a minimum of one randomly selected product test each year and additional testing at our discretion, and to publication of results. A new member is Verified from enrollment, meaning it is subject to random blind-purchase testing, and its results appear as they come in.
Testing history
Each test records the product, lot, date, laboratory, identity, purity, and report. When there are no published results, the profile says so clearly.
Informational listings
The directory also includes companies that do not participate, labeled Not enrolled · Not tested. Source Standard has not purchased or tested their products, and the listing is not a quality judgment.