Flex egg is simply a combination of ground flaxseed and water. This mixture yields a "gluey" substance similar to eggs that helps bind the ingredients together. Unlike traditional eggs, they don't contain any cholesterol at all! Not to mention that 1 flax egg has about 37 calories and 2.5 grams of fat while 1 chicken egg has about 70 calories, 5 grams of fat, and 211 grams of cholesterol! As a special bonus flax eggs offer you some extra fiber which you won't find in normal eggs.