If you’re looking for a way to cut back on added sugar without giving up sweetness, you’ve probably come across allulose and stevia as popular alternatives. Both are widely used in everything from protein bars to diet drinks, but they work in different ways. When comparing allulose vs stevia, it’s important to consider how they impact blood sugar, weight management, and overall health—because while they may be useful in the short term, they’re not necessarily an ideal long-term fix.

As a registered dietitian, I believe in balanced eating. My take on balance means focusing on whole foods (especially lots of plant foods) and limiting added sugars, while still allowing room for enjoyment and all foods. I also know that many people turn to sugar substitutes as a way to manage cravings and cut calories. While this is practical, it may not be the best long-term plan. In this article, I’ll break down the differences between allulose and stevia, including their benefits, downsides, and long-term effects, so you can decide what works for you, your body, and your goals.

Green image with two columns. Each column lists the key benefits of allulose or stevia.

What is Allulose?

Allulose is a rare sugar found naturally in small amounts in foods like figs, raisins, and wheat. It tastes similar to sugar but contains 90% fewer calories and doesn’t spike blood sugar or insulin levels.

Key benefits of allulose

  • Tastes like sugar.
  • Contains fewer calories than sugar.
  • No bitter aftertaste, unlike some other sweeteners.
  • Doesn’t raise blood sugar.
  • Some early research suggests it might improve insulin sensitivity.
  • Works well in baking. Unlike stevia, it behaves like sugar in recipes, giving you the moist texture and browning properties of sugar.

Potential Downsides of Allulose

  • Some people experience bloating, nausea, or diarrhea, especially in high amounts.
  • Headaches are another potential side effect of high amounts of allulose.
  • While early studies are promising, we don’t yet know the long-term effects of allulose on health.

What is Stevia?

Stevia is a zero-calorie sweetener derived from the leaves of the stevia plant. It’s been used for centuries in South America and has gained popularity as a natural sugar alternative. Unlike allulose, stevia is intensely sweet—often 200-300 times sweeter than sugar—so it’s typically blended with other ingredients like erythritol or inulin to balance its sweetness.

Key benefits of stevia

  • Improves blood sugar control in the short term.
  • Has no calories or carbs, so it can be an option if you’re looking to lose weight or manage your carb intake
  • Derived from a natural source, even though it’s heavily processed.
  • Works well in coffee, tea, and flavored drinks. It can be used for baking, but it’s not typically a 1:1 sugar replacement, so you should find stevia-specific recipes.

Potential downsides of stevia

  • Some people notice a bitter or licorice-like aftertaste.
  • Many stevia products contain erythritol or other additives, which may cause digestive discomfort.
  • Some research suggests stevia may alter gut bacteria and affect insulin responses, though more studies are needed. (The same could be said for other alternative sweeteners that are mentioned here, but I want to give you complete info!)

Allulose vs Stevia: Which is Better for Blood Sugar Regulation?

If you’re managing blood sugar levels, both allulose and stevia can be options, but they work differently in the body.

  • Allulose is a sugar that isn’t metabolized for energy, so it doesn’t raise blood sugar or insulin levels.
  • Stevia is not a sugar at all and is processed differently by the body, so it doesn’t raise your blood sugar when you consume it.

Both sweeteners seem safe for short-term blood sugar control, but long-term use may not be as beneficial. Emerging research suggests that even non-caloric sweeteners may contribute to metabolic dysfunction, potentially increasing the risk of type 2 diabetes over time.

This is how I look at it: Both are probably fine for occasional use, but if you’re relying on sweeteners multiple times a day–say, stevia in a couple of cups of coffee, a prebiotic soda, and a protein bar with allulose or another type of sweetener, it may be worth reevaluating your relationship with sweetness.

Allulose vs Stevia: Which is Better for Weight Management?

There’s no clear winner when considering allulose vs stevia for weight management. Both of these zero-calorie sweeteners can help reduce overall calorie intake, but it’s unclear whether either sweetener will promote sustained weight loss. In the short term, they may help reduce sugar intake, which could lead to weight loss if you’re eating a balanced diet and in the calorie deficit necessary for weight loss. 

That said, studies suggest artificial and natural sweeteners may lead to increased BMI over time and may even contribute to increased cravings for sweet foods.

This is why I emphasize balance over substitution. If you’re using allulose or stevia as a tool to reduce sugar, that’s great—but relying too much on any sweetener could make it harder to reset your taste preferences and naturally crave less sweetness over time.

Are There Any Side Effects of Allulose?

Allulose is generally well-tolerated, but some people experience:

  • Digestive discomfort, especially in higher amounts, which can cause bloating, gas, or diarrhea.
  • Unknown long-term effects. Since it’s relatively new, we don’t have decades of research on its safety, so we can’t say how this will affect your health over time. 

Are There Any Side Effects of Stevia?

The FDA considers stevia safe. 

  • Some people report bloating or nausea.
  • It may alter gut bacteria and affect insulin sensitivity in ways we don’t fully understand.
    Many stevia products contain fillers like erythritol, which can cause digestive issues if you’re sensitive to it.

How to Choose Between Allulose and Stevia

If you’re deciding between allulose vs stevia, here are some things to consider. Basically, it comes down to the usage and your goals. In reality, you may want to have both sweeteners on hand. 

  • For baking: Allulose behaves more like sugar, so it may be the better option when baking.
  • For drinks: Stevia works well in coffee, tea, and smoothies, and it comes in many formats, like flavored drops for coffee.
  • For the most sugar-like taste: Allulose is the closest match to sugar.
    For avoiding digestive issues: It’s close here. Stevia may have an edge, but if you have digestive issues, you may want to avoid both options.
  • For keto/low-carb diets: Both work, but early studies suggest that allulose has some potential metabolic benefits. However, allulose still contains a small amount of carbs, so if you’re trying to stay in ketosis, stevia may be better for your needs.

FAQs About Allulose and Stevia

Is allulose or stevia better for baking?

Allulose is the better choice because it mimics sugar’s texture and caramelization

Can I use allulose and stevia together?

Yes! Some products even blend the two to balance taste and texture.

Are allulose and stevia safe for kids?

While both sweeteners are generally recognized as safe, I’m not a fan of giving them to kids. Plus, recommendations are clear that sweetened drinks–no matter how they’re sweetened–are not recommended for kids or teens. My best advice is that kids should drink plain water and focus on getting most of their nutrients from whole foods.

Do allulose or stevia affect gut health?

We don’t have all the answers yet. Both sweeteners can alter gut bacteria, but more research is needed to understand the benefits or risks of these changes. 

The Big Picture

Both allulose and stevia can be useful tools for reducing sugar intake, but neither is a magic bullet for weight loss or long-term metabolic health. While they might help in the short term, relying too much on any sweetener—natural or artificial—may prevent you from resetting your taste buds and reducing overall sweetness cravings.

If you’re using sweeteners daily, it may be time to take a step back and ask: “Would it be helpful to cut back on sweet foods?” (If you answered yes, check out my blog post about how to detox from sugar.) 

Additional Resources

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