NCCIH.nih.gov provides information about the safety and effectiveness of complementary and integrative therapies.
The National Center for Complementary and Integrative Health (NCCIH), one of the U.S. National Institutes of Health, publishes the website and prepares its content.
Information for consumers includes Health Topics A-Z (listed by disease/condition or complementary therapy) and Herbs at a Glance (listing just the herb and botanical entries from Health Topics A-Z).
Information for healthcare professionals includes Clinical Practice Guidelines (organized by medical specialty); the NCCIH Clinical Digest (focusing on complementary and integrative approaches to a different medical condition each month); and Evidence-Based Medicine: Literature Reviews (pre-formatted PubMed searches for many conditions and therapies).
Tips for use:
– Selected information is available in Spanish.
Reviewed October 2025