TUESDAY, Nov. 22, 2022 (HealthDay News) Serum 25-hydroxyvitamin D (25[OH]D) levels are associated with diabetes risk in African-Americans (AAs), according to two studies published online in Nutrition & Diabetes and BMJ Open Diabetes Research & Care. Joshua J. Joseph, M.D., from The Ohio State University Wexner Medical Center in Columbus, and colleagues examined the