d.n.a. from two cells on the left hand side is the damage d.n.a. is pretty diffuse that's because these fine breaks in the molecules create this halo effect live on the right as a cell with little or no damage to the d.n.a. we were able to show that four weeks of coffee consumption in our test subjects reduced this minor damage. to. the way the coffee is prepared has an impact on this effect espresso beans a roasted longer than those for drip coffee that reduces the amount of acid in the concentrated shot making it easier on the stomach but filtered coffee contains less of the compounds caffe a stolen car wheel to substances that have a negative effect on cholesterol levels in the blood they don't pass through the filter so for those who have high cholesterol levels filter coffee is the better choice. because of it stimulating effect cardiologists used to warn heart