Did you know that the total blood volume in an average adult is about 6 litres? For a standard blood donation, approximately 450 mL is collected. When you provide a venous blood sample for anti-doping testing, a 4-tube blood draw requires up to 20 mL. For a Dried Blood Spot (DBS) sample, just a tiny drop—less than 0.15 mL—is needed! This infographic illustrates how minimal the required samples are, emphasizing a commitment to athlete welfare while maintaining the integrity of sport.