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Thank you to everyone who responded.  It was very
comforting to hear that I am not alone in experiencing
problems with sugar.  Many people wrote saying that
they too had similar symptoms.  Everyone was helpful
in their responses and had good suggestions.

The following possible causes for my symptoms were
suggested:
-diabetes
-hypoglycemia, reactive hypoglycemia
-Candida Albicans (yeast overgrowth)
-corn, corn syrup allergy
-cane sugar allergy
-glucose intolerance
-fructose intolerance
-carbohydrate intolerance

People offered the following suggestions:
-stay away from processed sugars
-use natural sweeteners like honey or maple syrup or
the herb stevia
-read the book "sugar blues"

Thanks again to everyone who responded.
Kim