Low fat diets are often needed to counteract the effects of damage done by highly refined, high fat, Western diets. Prevention is always better than having to live for the rest of your life with the problems of a damaged digestive system.
The food combining diet, by avoiding much of the fats in the Western diet, and by avoiding the unhealthy sugar / fat mixtures, greatly reduces the chances of damage to the digestive system. The food combining diet is also a naturally low fat diet. If you are following a low fat diet for medical reasons, you should discuss your diet with your doctor or nutritionist. If you cut out all the sources of fat in your diet you may end up with a diet that is too low in fat.
The main sources of dietary fat are cakes and biscuits and spreads like butter or margarine added to bread. Chocolate, most nuts and nut butters are high in fats, as are all oils, vegetable or otherwise. Remove obvious fat from meat and use chicken or turkey meat without the skin. Don't use full milk, butter or cheese. Use skimmed milk and low fat yogurt. Avocado is one of the few fruits to be high in fat. Fish like herring and mackerel contain oil, as do trout and salmon, particularly when farmed.
Always cook using moist methods without adding extra fat, and droplets can be skimmed from the top of cooking liquid before making sauces.
If blood cholesterol levels are too high, it is more important to cut out the excess fat from the diet, than to remove all foods containing cholesterol. Most cholesterol in the blood is manufactured by the liver from surplus fat. Cholesterol from food such as eggs or oily fish have little effect on blood cholesterol levels. Eggs and oily fish are both a valuable addition to the diet.