St John's wort (Hypericum perforatum) products – an assessment of their authenticity and quality

Conclusions : There is significant compositional variation among commercial finished products and two main causative quality problems were identified as adulteration by incorrect species or adulteration with food dyes. Generally, food supplements and unlicensed products were found to be of poorer quality than the regulated ones like registered THRs. Graphical abstract
Source: Phytomedicine - Category: Drugs & Pharmacology Source Type: research