This is a revised edition of the Lifestyle Medicine Board Review Manual for both the American and International Board of Lifestyle Medicine Certification Exams. This companion manual to a 30-hour online course prepares health care professionals to sit for and pass the lifestyle medicine board certification exam. There are 10 sections covering all lifestyle medicine core competencies and pillars to include nutrition, exercise, social connection, stress management, sleep, and risky substance use. It is the authors' intent for this Course to not only enable clinicians to quickly master the core competencies and pass their certification exam, but also to serve as a reference in the practice of Lifestyle Medicine and for teaching Lifestyle Medicine to students, residents and fellows.