Ralph L. Peterson, MD

Dr. Ralph Peterson brings more than 40 years of medical experience to MacArthur Gastroenterology, including over 30 years specializing in gastroenterology and internal medicine. For more than 12 years, his practice has focused on treating viral hepatitis, achieving a cure rate above 90% in Hepatitis B and C cases. He is a sought-after speaker and medical presenter on colorectal cancer and on the treatment and cure of Hepatitis B and C. Dr. Peterson has served on the advisory boards of leading pharmaceutical companies, including Gilead, and is also Medical Director of uFirst Health Partners, a nonprofit organization dedicated to fatty liver disease awareness and education. He also leads research and development at NEXT2ME, LLC, where he invented the 1440 Vibrational Energetic Spray supplement line. His work has taken him well beyond the clinic, including service as a medical team leader in Sierra Leone, evaluating medical needs across multiple provinces, and as a volunteer physician in Bohol, Philippines, training local providers in the treatment of gastrointestinal disease and hepatitis. A former Master's Track & Field world record holder in the 4x100 relay, Dr. Peterson has been recognized by the American Cancer Society, 100 Black Men of America, 100 Black Men of the Bay Area, and the Alameda County Board of Supervisors for his outstanding service to men's health.

Launch Announcement

MacArthur Gastroenterology LaunchesPhysician-Supervised Weight Managementand Fatty Liver Screening Programs New physician-led programs address two of the most common, and most overlooked, metabolic health conditions FOR IMMEDIATE RELEASE OAKLAND, Calif., July 27, 2026: MacArthur Gastroenterology today announced the launch of two new physician-led programs: a noninvasive fatty liver screening program and a physician-supervised weight management program.

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What Is MASLD? (Formerly Called Fatty Liver Disease)

MASLD stands for metabolic dysfunction-associated steatotic liver disease, the current medical term for what most people still call fatty liver disease. It develops when excess fat builds up inside liver cells, usually alongside conditions like obesity, prediabetes, or high blood pressure. Government health researchers estimate it affects roughly a quarter of U.S. adults, and most don’t know they have it.

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