The aim of this study was to investigate the effect of supplementing the daily intake of whole-fat dairy products with 750ml of milk and 250ml of yoghurt, and the influence of a concomitant program of physical exercise (30–45 min of running/cycling at 60% VO2 max every two-days) in young healthy ovo-lactovegetarian (n=14) and non-vegetarian control (n=10) athletes. Diet manipulation for a two-month period increased LDL-cholesterol (2.31±0.44 vs 2.51±0.42 mmol/l) and apo B (68±16 vs 75±15 mg/dl) levels as well as LDL-/HDL-cholesterol (1.65±0.47 vs 1.94±0.68) and apo B/apo A1 (0.46±0.15 vs 0.66±0.30) ratios (all p