Let me give you my opinion and experiences. I am not a nutritionist, just a normal person who has lost her fair share of pounds and through trial and error, has figured it out and is finally maintaining. First of all, I am not one of those people who believes sugar is evil. There are aprox. 16 cal. per tsp. Secondly, I am not a big fan of chemicals in the body and artifical sweetner is a chemical. I don't think artifical sweetners are bad, and they can help in weight control but if you are getting cramps maybe there is a connection. Stop the sweetners and see if the cramps stop. Also, dairy products can give cramps if you are lactose intolerant - check to see if the foods that give you cramps are dairy.
You can find all kinds of opinions on the web - sugar evil, sugar good,etc.
When I was dieting, I counted a tsp. of sugar as a fat - I used 2 tsp. in my coffee and that was two fat allowances. When I was dieting, I didn't do a lot of baking but when I did, I tried to figure out the calories and count it accordingly.
Brown sugar has the same calories as white.
Sugar can be bad in weight control because it adds empty calories - If you have to drink soda - I would go for diet because I hate to waste 150 - 200 calories on an empty drink -
I found that when I wanted hot chocolate, if I Just measured out one cup of lo-fat milk, - counted it as a dairy, then added some chocolate - and counted it as a fat - I was more satisfied then the brands with the artifical sweetner that tasted lousy.
It all comes down to calories - unless you have a specific medical problem, ie. diabetes, hypoglycemia, or food sensitivity, sugar is not bad.
Didn't mean to ramble - Just while you are dieting, avoid heavily sweet things, (you know what foods) count the sugar you use as calories, points, fats - whatever, and use foods with artifical sweetners sparingly.
Hope I helped.