Bloodletting lowers BP dramatically

Good old-fashioned bloodletting dramatically lowers blood pressure, improves glycaemic control in obese adults and could offer a viable alternative to antihypertensive drugs, research suggests.

A randomised trial found two phlebotomy sessions led to an 18mmHg drop in systolic BP after six weeks in patients with the metabolic syndrome.

The procedure — involving the removal of 300mL of blood in the first session and up to 500mL in the second —