Jose Mejia (L) and Christopher Mejia prepare vegan foods in the Plant Food For People vegan taco trailer, parked on the street on August 5, 2016 in the gentrifying Highland Park section of Los Angeles, California.
Vegan diets are considered by most as healthy and environmentally responsible. But even vegans -- who eschew all animal products like meat and dairy -- crave junk food. And with temptations like donuts, pizza and mock hamburgers on offer, vegans can be just as unhealthy as everybody else. / AFP / DAVID MCNEW        (Photo credit should read DAVID MCNEW/AFP/Getty Images)