Micromedex provides referenced information about drugs, toxicology, diseases, acute care, and alternative medicine. Also access IBM CareNotes which includes patient education handouts, conditions, and diagnoses.
This government office has many fact sheets on herb and supplement products. In addition they generate reports of supplements of interest or concern. A mobile app is available called My Dietary Supplements and numerous links take users to sources of additional information.
PubMed has two "special queries" for CAM topics: (1) Complementary Medicine and (2) Dietary Supplements. Searchers may also use Medical Subject Headings (MeSH) include “Complementary Therapies” and “Plants, Medicinal.” These searches can be combined with specific CAM therapy topics.