For runners, food is fuel, and a new study lays to rest debates about which diet is best. Researchers at Leibniz University, in Hannover, Germany, recruited 76 men and women runners, divided equally between vegans, vegetarians and omnivores. They had an average age of 27 and ran recreationally two to five times a week. The runners were asked to pedal to exhaustion on a stationary bike, and researchers found that all three groups had similar exercise capacity and power output, and similar lactate production during exercise. The researchers concluded that vegan diets were “a suitable alternative for ambitious recreational runners.”