Actually a constant flow of carbohydrates regardless with fiber or not is what causes arterial damage also known as heart disease. It happens when the cholesterol responds to the all the sugar in your blood from eating carbs turns into a type b ldl. Small and dense and builds up in arteries. When adding fats, even saturated fats back into the diet and eliminating carbs to around 100 per day. HDL shoots up and LDL may also go up. But the important thing is LDL switches to a large fluffy pattern that does not penetrate arterial walls, but is rather easily carried back to the liver by HDL. Oh did you know that HDL and LDL are not actually cholesterol but rather carriers? LDL takes cholesterol to damaged arteries and other cells. After cholesterol does its thing HDL carries the used cholesterol back the the liver.