At the start, their liver enzyme levels were normal, but after just one week of this diet, more than 75 percent of the volunteers’ liver function test results became pathological.21 If an unhealthy diet can cause liver damage within just seven days, it should be no surprise that NAFLD has quietly become the most common cause of chronic liver disease in the United States, afflicting an estimated seventy million people.22 That’s about one in three adults. Nearly 100 percent of those with severe obesity may be affected.
