What organization researches promotes and trains professionals in complementary medical practices?

The National Center for Complementary and Integrative Health (NCCIH) is a key organization that researches, promotes, and trains professionals in complementary and integrative medical practices. Part of the U.S. National Institutes of Health, NCCIH supports rigorous scientific research to evaluate the efficacy and safety of various complementary health approaches. It also provides resources and training for healthcare professionals interested in incorporating these practices into their care.