New Heinz [Seriously] Good Light Mayonnaise. With at least 60% less fat than Heinz [Seriously] Good Mayonnaise, Light is perfect if you are keeping a check on calories, and still tastes great! The best ketchup, the best salad cream and now our best mayonnaise. We have applied all our expertise to develop our best ever mayonnaise to go with everyday foods like sandwiches, salads, jacket potatoes or chips. Made with free range eggs and containing absolutely no added colours, flavours, preservatives or artificial thickeners, we hope you like it just as much as we do. .