How Many Syns in Mayonnaise?

Mayonnaise is one of those kitchen staples that quietly sabotages an otherwise sensible Slimming World day, and it pays to understand why before you reach for the jar. Standard full-fat mayonnaise is essentially an emulsion of oil and egg yolk, which means roughly 70-80% of its weight is pure fat. That translates to around 3.5 syns for a single tablespoon, and most of us are pretty generous with the dollop on a jacket potato or in a tuna sandwich. Two tablespoons takes you to 7 syns, which is more than half of a typical daily allowance gone before you have even sat down.

The good news is that there are plenty of swaps that keep the creamy texture you love without the eye-watering syn cost. Light or extra light mayonnaise typically clocks in at 1.5-2 syns per tablespoon, which is a much friendlier number for everyday use. Reduced-fat versions from supermarkets like Hellmann's, Heinz and own-brand ranges have come a long way in flavour, and many members find they cannot taste the difference once mixed into a coleslaw or potato salad.

For truly free alternatives, fat-free natural yoghurt or quark whipped with a teaspoon of mustard, lemon juice and a pinch of salt makes a surprisingly convincing mayonnaise substitute on Food Optimising. Some members blend silken tofu with vinegar and seasoning for a vegan version. If you are tracking carefully, weigh your mayonnaise rather than eyeballing it, because a heaped tablespoon can easily creep up to 20-25g rather than the standard 15g portion size. Treating mayonnaise as an occasional indulgence rather than a default condiment is the simplest way to keep it from derailing your week.