Mayonnaise is pretty much 100% fat, and regular mayonnaise has 90 calories of it in a tablespoon. Kraft Reduced Fat Mayo with Olive Oil has only 45.  And yet, I find it just as satisfying as the Hellman's Mayo I grew up on – maybe even more so!  Smooth and creamy with a slightly more agressive tang than Hellman's, it's one instance where reduced fat doesn't equal reduced satisfaction.    Look for the green label at your local supermarket.