The best and safest artificial sweeteners are erythritol, xylitol, stevia leaf extracts, neotame, and mon fruit extract—with some caveats:
• Erythritol: Large amounts (more than about 40 or 50 grams or 10 or 12 teaspoons) of this sugar alcohol sometimes cause nausea, but smaller amounts are fine. (Sensitivities vary among individuals.) Erythritol, small amounts of which occur naturally in some fruits, is about 60 to 70 percent as sweet as table sugar and has at most one-twentieth as many calories. Unlike the high-potency sweeteners, erythritol provides the bulk and “mouth feel” of sugar.
• Xylitol: This sugar alcohol, which occurs naturally in birch and some other plants, is about as sweet as table sugar and has about three quarters of the calories. Too much xylitol (about 30–40 grams or 7–10 teaspoons, although sensitivities vary) could produce a laxative effect and/or gastrointestinal distress.