Decaffeinated coffee may be harmful to heart 15:00 16 November 2005 NewScientist.com news service Gaia Vince Decaffeinated coffee may have a harmful effect on the heart by increasing the levels of a specific cholesterol in the blood, researchers say. Their explanation is that caffeine-free coffee is often made from a type of bean with a higher fat content. Robert Superko, at the Piedmont-Mercer Center for Health and Learning in Atlanta, Georgia, US, and colleagues looked at the effects of coffee on 187 people. The group was split into three similar-sized groups for the three-month study: one group drank three to...