 [ Symptoms ] my sister is in her 30 is she can not open her mouth sallow in lots of pain and can not talk or walk all this started after she had a tooth pulled what could be wrong with her she is in the hospital now and they have said her body is shutting down [ Disease ] the fda sets rules for what food manufacturers can call light  low  reduced  free  and other food terms here is the low down on these terms healthy food must be low in fat with limited cholesterol and sodium anything labeled free must only contain tiny amounts of the ingredient in each serving for example trans fat free or fat free products can have only 0 5 mg of trans fats or fat cholesterol free foods can only have two milligrams of cholesterol and two grams of saturated fat a serving of food labeled low sodium can have a maximum of 140 milligrams of sodium a serving of low cholesterol food can have a maximum of 20 milligrams of cholesterol and two grams of saturated fat one serving of a low fat food can have a maximum of three grams of fat a serving of a low calorie food can have a maximum of 40 calories a serving of a food labeled reduced must have 25 less of the ingredient than a serving of the regular version one serving of a light food must have 50 less fat or 13 fewer calories than the regular version the food and drug administration fda regulates what claims a product can make the following are a few examples to answer your question   free this term means that a product contains no amount of or only trivial or physiologically inconsequential amounts of one or more of these components fat saturated fat cholesterol sodium sugars and calories   low this term can be used on foods that can be eaten frequently without exceeding dietary guidelines for one or more of these components fat saturated fat cholesterol sodium and calories   low fat  3 g or less per serving   low saturated fat  1 g or less per serving   low sodium  140 mg or less per serving   very low sodium  35 mg or less per serving   low calorie  40 calories or less per serving   low cholesterol  20 mg or less and 2 g or less of saturated fat per serving   reduced this term means that a nutritionally altered product contains at least 25 percent less of a nutrient or of calories than the regular or reference product however a reduced claim can not be made on a product if its reference food already meets the requirement for a low claim   light this descriptor can mean two things   that a nutritionally altered product contains one third fewer calories or half the fat of the reference food   that the sodium content of a low calorie low fat food has been reduced by 50 percent