Both butter and mayo are almost 100% fat, so both have about the same number of calories (around 100 per tablespoon). But mayonnaise is much lower in saturated fat, which may be better for your heart.
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I dont know which is worse in a crunch, using a very small amount of mayo on toast or a very small amount of margarine. No special name brand, just cheap generic of both. I am at work and jelly was not an option nor was real butter. Putting nothing on at all was completely out of the question. When this situation arises which is worse for my body?
The short answer is that they are about the same. Two teaspoons of either “cheap generic” mayonnaise or margarine will contain about 7.5 grams of fat. Of that about 1 gram is saturated fat. Theres probably a little more sodium in the margarine. This comparison does assume that the margarine is the softer kind that comes in a tub. Both have about 65 calories in a two teaspoon serving.
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To expand on this a little (the long answer), the one reason that you might want to choose one product over the other would be if there were fewer or no trans fats listed on the package. These are the types of fats that is the worst for your body. Fewer and fewer products have these and the US Government now mandates that the amount be reported in the Nutrition Facts section on the package label.
Butter Vs. Mayo: Which Makes A Better Grilled Cheese
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