17% of Americans tried Atkins diet, 4% still on it

According to Harry Balzer of the NPD Group, a market research company, 17% of the U.S.

According to Harry Balzer of the NPD Group, a market research company, 17% of the U.S. population has tried the Atkins diet, arguably the most popular of the high-protein weight loss plans. In addition, 4%, or about 10 mil people, are on the diet, Balzer said.