The document summarizes the American Society of Clinical Oncology's (ASCO's) endorsement of the Society for Integrative Oncology's (SIO's) 2017 clinical practice guideline on the use of integrative therapies during and after breast cancer treatment. ASCO endorsed the SIO guideline after conducting a methodological and content review. The SIO guideline addresses integrative therapies for managing symptoms/side effects and makes recommendations for therapies to reduce anxiety, nausea/vomiting, depression, fatigue, lymphedema, and improve quality of life. Therapies recommended include meditation, music therapy, yoga, and acupuncture.