New research indicates that consuming nuts at least twice a week could reduce the risk of heart disease. Researchers at the Brigham and Women's Hospital in Boston studied the nut intake of 21,000 male doctor volunteers who took part in the US Physicians' Heath Study, launched in 1982. The researchers reported a 47% lower risk of sudden cardiac death in participants who ate an ounce of nuts at least twice per week compared with participants who ate no nuts at all.