Quality Assessment of Food Supplements - Botanicals
© Lechtenberg/IPBP
Food Supplements - Botanicals: Quality on the Test Bench

Herbal preparations (so-called "botanicals") are widely used in food supplements (FS) and are often labeled as natural. Although FS are not pharmaceuticals, a variety of claims are made (especially in the case of "botanicals") about their potential health benefits. Whereas in the case of medicinal products, manufacturers, distributors and authorities are legally involved in quality control, in the case of food supplements, manufacturers and distributors alone are responsible for compliance with food regulations (see link list). A control by the food monitoring authorities exists, but is often only insufficiently possible for this special market segment due to capacity reasons. The quality of "Botanicals" is intransparent for the consumer.

We have therefore launched the project "Quality assessment of food supplements - botanicals" in 2019. Selected product groups will be investigated and evaluated using validated analytical methods. The methods and results will be published in scientific journals. In addition, the results will be published on this website in the form of descriptive summaries in line with the "Open Science"- principles.

It is planned to continue the project in the future with the inclusion of further product groups and to subject the two older studies (green tea and kava-kava) to a current re-evaluation.

Project timeline
© IPBP/Lechtenberg
Brassica oleracea var. italica Plenck
© Krüger/IPBP


Crocus sativus L. (stigmas)


© Sharon McCutcheon / Unsplash


Camellia sinensis (L.) Kuntze
© IPBP/Krüger

Green tea

Piper methysticum G.Forst.
© F.&K.Starr/Wiki Commons