Depends. Diet Coke is fat free and has 0 calories. Gummy Bears are fat free and have lots of calories.
no. . . hence the name
Not necessarily. Some fat-free foods contain trace amounts of fat, but it isn't enough to be concerned about (less than .5 grams per serving).
carboxyl group, a set of four atoms bonded together and present in carboxylic acids, including amino acids
No, if it is fat free it will say it is fat free.