Turn your spring cabbage into a super diet food by making it into sauerkraut. "Sauerkraut helps to reestablish healthy populations of bacteria in the gut," says Stella Metsovas, clinical nutritionist and owner of W8less Nutrition. New research suggests that those who are overweight and struggle to lose weight may have unhealthy populations of bacteria in their gut, so adding as many pro-bacteria foods (like sauerkraut) to your diet is essential to long-term weight loss, she adds. Sauerkraut too strong to eat solo? Throw it on a Reuben sandwich.