The best sugar substitute depends on what you’re using it for. Stevia and monk fruit work well for sweetening drinks with zero calories. Erythritol and xylitol bake more like real sugar. Allulose behaves the closest to sugar in recipes while carrying only 5% of the calories. Each option has trade-offs in taste, digestive tolerance, and how it performs in cooking, so the right pick comes down to your priorities.
Allulose: Closest to Real Sugar
Allulose is a rare sugar naturally found in small amounts in figs, raisins, and maple syrup. It tastes and behaves almost identically to table sugar, browning in the oven and dissolving in liquids the same way. The difference is that your body absorbs it but doesn’t metabolize it for energy, so it provides roughly 0.2 calories per gram compared to sugar’s 4 calories per gram. That’s a 95% calorie reduction.
What makes allulose particularly interesting is its effect on blood sugar. In a crossover study published in BMJ Open Diabetes Research & Care, participants who consumed allulose alongside a standard sugar load saw a dose-dependent drop in blood glucose at the 30-minute mark. The 7.5-gram and 10-gram doses produced statistically significant reductions. This makes allulose appealing for people managing blood sugar, though it’s worth noting the effect was most pronounced shortly after eating rather than over several hours.
Allulose can be substituted for sugar at roughly a 1:1 ratio in baking, though it’s about 70% as sweet as sugar, so some people use slightly more. It doesn’t crystallize the same way, which makes it better for soft cookies, sauces, and ice cream than for hard candies. It’s widely available in granulated and liquid forms and is generally well tolerated digestively, unlike some sugar alcohols.
Stevia and Monk Fruit: Zero-Calorie Plant Extracts
Stevia comes from the leaves of the Stevia rebaudiana plant and is 200 to 300 times sweeter than sugar. A tiny amount goes a long way, which is why most stevia products are blended with a bulking agent like erythritol or dextrose. Pure stevia can have a bitter or licorice-like aftertaste, especially at higher concentrations. Many people find that liquid stevia drops produce less off-flavor than powdered versions.
Monk fruit sweetener comes from a small melon native to Southeast Asia. Its sweetness comes from compounds called mogrosides, with the primary one being about 250 times sweeter than sugar. Like stevia, monk fruit extract is almost always diluted with another ingredient to make it measurable in recipes. On its own, monk fruit tends to have a cleaner taste than stevia, with less bitterness, though some people detect a slight fruity or caramel note.
Neither stevia nor monk fruit raises blood sugar or contributes calories. Both are heat-stable, so they can technically go into baked goods. The challenge is volume: sugar provides structure, moisture, and browning in baking, and a few drops of concentrated sweetener can’t replicate that. If you’re using these for coffee, tea, smoothies, or salad dressings, they perform well. For baking, you’ll usually need them blended with a bulking sweetener like erythritol or allulose.
Sugar Alcohols: Erythritol, Xylitol, and Maltitol
Sugar alcohols are carbohydrates that taste sweet but are only partially absorbed by the body. They show up on labels as erythritol, xylitol, sorbitol, and maltitol, and they’re the backbone of many “sugar-free” candies, protein bars, and chewing gums.
Erythritol has been the most popular of the group because it’s nearly calorie-free (about 0.2 calories per gram), doesn’t spike blood sugar, and causes less digestive trouble than other sugar alcohols. It’s about 70% as sweet as sugar and has a mild cooling sensation. However, a 2024 study published in the AHA journal Arteriosclerosis, Thrombosis, and Vascular Biology found that ingesting 30 grams of erythritol in healthy volunteers enhanced platelet reactivity, a marker associated with blood clotting. The same research team found that higher fasting levels of erythritol in the blood were associated with increased three-year risk of heart attack, stroke, or death in both U.S. and European cohorts. This doesn’t prove erythritol causes cardiovascular events, but it’s enough to warrant caution, especially at high daily intake levels.
Xylitol is about as sweet as sugar and has a notable benefit for dental health. It actively reduces the bacteria responsible for tooth decay. The California Dental Association recommends about 5 grams of xylitol per day, spread across three to five exposures (such as gum or mints), for optimal cavity prevention. Xylitol is more likely to cause bloating and diarrhea than erythritol, though. In a British study comparing the two, xylitol produced significantly more gastrointestinal symptoms, while erythritol only caused mild nausea and gas at large doses.
Maltitol is common in sugar-free chocolate and candy because it handles heat well and has a similar bulk to sugar. But it raises blood sugar more than other sugar alcohols and is one of the most likely to cause digestive distress. The Cleveland Clinic notes that research supports 10 to 15 grams per day of sugar alcohols as a generally safe range, but many processed foods contain far more than that in a single serving.
Artificial Sweeteners: Sucralose and Aspartame
Sucralose (sold as Splenda) is 600 times sweeter than sugar, heat-stable, and has no calories. It’s one of the most versatile artificial sweeteners for cooking. The FDA has set its acceptable daily intake at 5 mg per kilogram of body weight. For a 150-pound person, that’s about 340 mg per day, which translates to roughly 28 packets of Splenda. Most people don’t come close to that threshold.
Aspartame (found in Equal and Diet Coke) has a higher acceptable daily intake at 50 mg per kilogram of body weight. It breaks down at high temperatures, so it’s not useful for baking. Aspartame has been studied extensively over decades and remains approved by every major food safety agency, though it continues to generate debate. People with the rare genetic condition phenylketonuria (PKU) need to avoid it entirely because they can’t metabolize one of its components.
In 2023, the World Health Organization released a guideline recommending against using non-sugar sweeteners for weight control, noting that the available evidence doesn’t show long-term benefits for reducing body fat in adults or children. The WHO classified this as a conditional recommendation, meaning the evidence was suggestive but not definitive, partly because the studies were complicated by differences in participants’ baseline health and how they used sweeteners. The recommendation specifically excludes people with pre-existing diabetes, for whom sugar substitutes may still play a useful role in managing blood sugar.
Best Options for Baking
Baking is where sugar substitutes get tricky. Sugar doesn’t just add sweetness to a recipe. It provides bulk, helps dough spread, retains moisture, creates browning, and contributes to texture. Most zero-calorie sweeteners can’t do all of that.
Allulose is the closest one-to-one replacement. It browns, dissolves, and creates a moist crumb in cakes and cookies. Erythritol works well in recipes where a slight cooling effect isn’t a problem, though it can crystallize and create a gritty texture in some applications. The Institute of Culinary Education recommends starting with a 1:1 substitution for any new sweetener, then adjusting based on results. Lowering your oven temperature slightly helps prevent over-browning, and pressing cookie dough flat before baking compensates for the fact that many sugar substitutes don’t spread the way sugar does.
For more rustic, dense baked goods like brownies and flourless cakes, date sugar (ground dried dates) and maple sugar are whole-food options. They contain the same calories as sugar but also bring fiber, minerals, and a richer flavor. They won’t reduce calorie counts, but if your goal is simply to move away from refined white sugar, they’re solid choices.
Choosing Based on Your Goal
If your priority is blood sugar control, allulose has the strongest evidence for actively lowering post-meal glucose spikes. Stevia, monk fruit, and erythritol are also blood-sugar-neutral, making them reasonable options.
If you want the fewest calories with the least digestive risk, stevia and monk fruit are hard to beat. They contribute zero calories, don’t affect blood sugar, and won’t cause the bloating that sugar alcohols can.
If you bake frequently and want results that taste like the original recipe, allulose is your best bet, with erythritol as a runner-up for cookies and muffins where slight cooling or crystallization won’t be noticeable.
If dental health matters to you, xylitol stands alone. No other sweetener has the same active cavity-fighting properties. Chewing xylitol gum a few times a day is one of the easiest ways to get the benefit without overhauling your diet.
If you’re cautious about newer research, the emerging cardiovascular signals around erythritol are worth watching, particularly if you consume it daily in large amounts. Rotating between different sweeteners rather than relying heavily on a single one is a practical way to limit exposure to any individual risk.