Team of Advisors

Harold Oster, M.D.
Chief Medical Officer

Harold Oster grew up in Miami, Florida, graduating college and medical school at the University of Miami. He completed his internship and residency at UCSD Medical Center in San Diego. He then returned to the University of Miami for a fellowship in Infectious Diseases, remaining on faculty as Interim Chief of Infectious Diseases at the VA Medical Center.

In 1999, Harold moved back to San Diego where he worked as a primary care internist at Scripps Clinic. In 2001, he left Scripps to work at UCSD Medical Center, practicing Internal Medicine and Infectious Diseases. In 2004, Harold and his family moved to Minnesota where he worked at Allina Health as an internist and clinic lead physician until retiring from the practice of medicine in 2024.

Harold’s medical interests are diverse, ranging from infectious diseases to diabetes and disease prevention. His passion for health and wellness led him to write a book on weight loss, The Three Rules to Lose Weight and Keep It Off Forever, which he updated with a second edition in 2024. He reviews medical articles for the Natural Health Research Institute and is currently working on another book.

Harold and his wife met in medical school. She has a thriving Ophthalmology practice, and their son is a senior software engineer at Optum Health. In his free time, Harold enjoys hiking, drawing, and playing the piano.