Our herbs are from Spring Wind Herbs. We believe Spring Wind offers the highest quality bulk herbs in the United States. Here is their information on product quality.


At Spring Wind we seek out the best quality of herbs available at any given time and spend considerable resources assuring that each herb is what we say it is.

As Spring Wind expands its lines of Organic and Premium Grade herbs we gain more direct connections with the growers of our herbs. This helps us to increase the transparency of our sourcing and aids in our goal of providing carefully grown, correctly identified Chinese herbs. The highlights of our herb program can be summarized as follows:

Correct species - We put great effort into correctly identifying the species of the items we sell. This is a science which we are still perfecting even though we have been at it for almost 20 years. Macroscopic and microscopic examinations are employed to compliment other organoleptic (sense-derived) data such as smell and taste in determining species identification. We use theChinese Pharmacopeia for verification where the given herb is listed in that text. For the few herbs that require chemical analysis to reliably determine correct identification we rely on laboratory testing.

Quality evaluations - We purchase herbs in small batches. This insures that Spring Wind herbs are fresh. We obtain samples of each lot before purchase to ensure the quality meets our strict standards. Herbs must be clean, fresh and of good color and sapor to meet our rigorous inspection. We use herb-specific criteria when evaluating quality. For example, Niu Bang Zi (Arctium seed) is best when the seed is plump and carries no seed husk, high quality fresh Bai Zi Ren (Biotae seed) is oily and is a light-yellow color and Yan Hu Suo (Corydalis) is best if it is large, firm and its cross-section is golden-yellow. We use vacuum packing to insure freshness for herbs for which this is required.

Rigorous testing - Spring Wind has the most rigorous pesticide testing program in the industry. We accept only a ND (none detected) result on our pesticide tests. Our sulfur-free herbs are tested either by in-house vapor testing (limit of 1.0 ppm) or by lab titration for sulfites (ND only).

Originally from: http://springwind.com/products-quality


†. Spring Wind has two standard testing protocols. The first tests for the following classes of pesticides: organophosphates, chlorinated hydrocarbons, methyl carbamates, organonitrogens and pyrethroids (over 250 pesticides total). The second tests for organophosphates, organochlorines, pyrethroids and the pesticide potentiator, Piperonyl butoxide (over 135 pesticides total).