The National Center for Complementary and Integrative Health (NCCIH) is a U.S. government agency that focuses on research related to complementary and alternative medicine. It aims to provide scientific evidence about the effectiveness and safety of various health practices, including herbal remedies, acupuncture, and mindfulness. NCCIH is part of the National Institutes of Health (NIH) and works to educate the public and healthcare professionals about integrative health approaches. The center supports studies that explore how these therapies can be used alongside conventional medicine to improve patient care and overall health outcomes.