Is Mayonnaise Fattening? | The Condiment Co

In short, yes, mayonnaise is fattening - even 'light' mayonnaises.

Whether you like your mayonnaise spread in a sandwhich, blended into a yummy tuna pasta or blobbed on the side of a salad, it's just delicious. However, it is fattening and should be avoided if you're on a diet. Mayonnaise is full of fat and has lots of hidden calories. Even 'light mayonnaises' are not necessarily healthy, so you should check whether these are fattening as well.