When it comes to the American diet and the food that's literally killing us, you can't have too many cautionary tales, and the new documentary "Forks Over Knives" is a sobering, effective example. Written and directed by Lee Fulkerson, it claims that the obesity epidemic and the medical complications it leads to including heart disease, diabetes and cancer can be prevented — and in some cases reversed — by eating a whole foods/plant-based diet that eliminates or drastically reduces meat, dairy, eggs and processed foods.

The film backs up that claim with statistics, patient stories and studies conducted by the two noted doctors it follows, Dr. T. Colin Campbell and Dr. Caldwell Esselstyn, whose research separately confirmed the correlation between diet and disease. But it's the real-patient case studies that make the biggest impression, including Fulkerson's own — he overhauled his diet with profoundly dramatic results.

Already playing in New York and Los Angeles, "Forks Over Knives" rolls out in more cities over the next few weeks (details can be found at ForksOverKnives.com).

New food documentary wants to change your diet
Lee Fulkerson's documentary 'Forks Over Knives' message: eat your veggies, live longer. The film backs up that claim with statistics, patient stories and studie