The dangerous thing about condiments like ketchup is the amount a person uses. Easy to get carried away on serving size.

On the other hand tomatoes are kind of medium on carbs. If a person is trying to stay under 20 grams things like tomatoes have to be watched on portion size. On the other hand, a 100 gram carb diet, which would work great for people who do not need to lose weight and are otherwise healthy, there is plenty of room for the medium carb foods. 100 grams carbs is still a third of what the average SAD diet is.

For weight loss 20-50 grams carbs seems to work well for most.

John