the jar of hellman's in my fridge has sugar on the label.

You can make your own mayo in 5 minutes.

Well, if we're making stuff, you can also easily make your own ketchup.

There is a brand that has no added sugar that I believe the poster up thread is mentioning based upon the ingredients. It's ok, but honestly tastes a little like just thick tomato sauce, could be a little more fermented/more vinegar, but it's a fine substitute for HFCS based ketchups.

[1] https://www.primalkitchen.com/products/organic-unsweetened-s...

Yep, that's the one. I've not eaten it myself so I can't comment on "how it goes" as I mostly just try to avoid sauces like ketchup in general when possible.

A tablespoon of mayonnaise is 90 calories.

A tablespoon of the most HFCS sweetened ketchup is 20 calories.

It may be a win on taste but I'm not sure it's a win on calorie reduction. I do love some mayonnaise fries, tho.

But if we go one level deeper, fat does fill you up much better than simple carbs like HFCS. In fact, HFCS will create more appetite (more than even plain sugar) down the road which at the end will make you eat more - and probably even of the same kind. Therefore, it's not very clear to me it's a win in calorie reduction either.