Moon's suggestion is right on.
Margarine is a combination of hydrogenated oils, and just by that fact alone, is BAD for you. Do a little search on hydrogenation of oils, and educate yourself to the dangers. They are many.
Despite the fact that sugar finds its origins in plants, it is a HIGHLY processed non-food by the time it gets into your body. There are no benefits (except taste), at all, to common table sugar, and far too many unpleasant side effects. If sweets MUST be eaten -I confess to a LARGE likeness of sweet

- those found in their most whole form (a piece of FRESH fruit) are the safest, when eaten in moderation.
So, to answer your question, it could well be the fats, and it could be the sugar, or both or neither. An elimination diet should answer the question.
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Copper
Let Miracles Replace all Grievances
[This message has been edited by Copper (edited 01-13-2001).]