Our Lean Cat Food formula is very similar to our adult cat food. It contains 28% protein from Chicken, Eggs, Brewers Yeast and Fish, but has less then half the fat of the normal adult cat food formula. The Lean formula is great for grown cats that need to slim down or indoor cats that do not get much of exercise. We add a couple very important ingredients like Taurine which ensures normal heart function, vision and reproduction and Cranberry for urinary tract health. This formula is an excellent choice for cats that free feed or need to lose weight. As usual, our dry foods are preserved with mixed tocopherols, a natural source of vitamin E, that keep the food from spoiling the way canned food does.