I have baked with Splenda, it does taste chemical and the cakes bake out different If you do not want to use sugar I would use agave syrup or stevia to sweeten things. But you have to be careful with artificial stuff:
Animal studies have indicated that a sweet taste induces an insulin response in rats.[6] However, the extension of animal model findings to humans is unclear, as human studies of intragastric infusion of sucralose have shown no insulin response from analogous taste receptors.[7] The release of insulin causes blood sugar to be stored in tissues (including fat). In the case of a response to artificial sweeteners, because blood sugar does not increase there can be increased hypoglycemia or hyperinsulinemia and increased food intake the next time there is a meal. Rats given sweeteners have steadily increased calorie intake, increased body weight, and increased adiposity (fatness). Furthermore, the natural responses to eating sugary foods (eating less at the next meal and using some of the extra calories to warm the body after the sugary meal) are gradually lost.[8]
Quote from wikipedia. The best thing is to eat everything in moderation, sugar is not bad for you but if you eat it in pounds a day it will have side effects.
There is also sorbitol, apple juice concentrate that you can use to sweeten things up if you do not want to use sugar.
But stay away from artificial stuff, diabetes and weight gain will loom ahead.
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