High glycemic foods, which tend to cause a brisk elevation in sugar levels in the blood stream, cause a 22% increase in inflammation in overweight and obese adults. This was measured based on CRP (C reactive protein) levels. Low glycemic foods tend to have more fiber and are not processed and don't cause a rapid increase in blood sugar levels. This also raised levels by 5% of a hormone known as adiponectin, which helps protect against heart attacks, strokes, and type 2 diabetes.