Are all the herbs vegetable in origin? How are they sourced and what are their quality

The Chinese herbal formularies include ingredients from all three kingdoms: vegetable, animal and mineral. However, the majority are from vegetable sources. Examples are roots, stems, leaves, twigs, bark, tubers, flowers etc.

15-20% of the standard Chinese repertoire of come from outside China. The Chinese have incorporated herbs from all over the world into their materia medica, but it is the usage of herbs according to Chinese medical theory and TCM pattern diagnosis that make them “Chinese.”