Trade in herbal materials is large and uneven. Quality failures are usually failures of identity, substitution, or records.
Regulation is set by the authorities, not by this website. Readers can start from the Ministry of AYUSH, the National Medicinal Plants Board, and the National Biodiversity Authority. A link is not a partnership.
Where to check the rules
Start with the Ministry of AYUSH, the National Medicinal Plants Board, and the National Biodiversity Authority. Those links are on the references page. They are not a statement that Dr Chandan represents those institutions.