What Is Stevia? Benefits, Safety, and How to Use It

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• Stevia is a zero-calorie sweetener derived from the stevia plant, the only sugar substitute that is both natural and calorie-free.

• Because the body doesn't absorb its steviol glycosides, stevia has a glycemic index of zero, which makes it a helpful option for blood sugar and diabetes management.

• The FDA recognizes highly purified stevia extract as Generally Recognized as Safe, with no known side effects in moderate amounts.

• Not all stevia products are created equal, always check the ingredient list, since many brands add sugar alcohols, dextrose, or other fillers.

• Stevia is a smart swap for sugar, but a zero-calorie sweetener is never a reason to overdo it on treats.

Stevia: the natural, zero-calorie sweetener

Stevia is the plant-derived sugar substitute that keeps sparking debate in the nutrition world. Here's a clear breakdown of what it is, whether it's safe, and how it compares to sugar and other sweeteners, so you can make a confident choice.

What is stevia and where does it come from?

Stevia is a zero-calorie sweetener derived from the stevia plant, native to South America. Unlike other calorie-free sweeteners, it's extracted from a plant, making it the only sugar substitute that is both natural and calorie-free. The sweet compounds, called steviol glycosides, are 250 to 300 times sweeter than table sugar, so a little goes a long way. On labels, watch for other names: stevia extract, Rebaudioside A (Reb A), stevioside, and steviol glycosides.

Is stevia natural or artificial?

Natural. Artificial sweeteners are made from molecules that don't exist in nature; stevia is extracted and purified from a plant, much like vanilla is drawn from a vanilla bean. The leaves are harvested, the steviol glycosides are extracted with water, then filtered and purified for use.

Is stevia bad for you? Safety and side effects

For most people, stevia is considered safe. The FDA has labeled highly purified stevia extract (95% or more steviol glycosides) as Generally Recognized as Safe, and there are no known side effects from consuming moderate amounts. Studies suggest reasonable amounts are fine for most adults, and even for pregnant women and children. As with anything, moderation is the rule.

Why was stevia banned? A quick history

If you've seen claims that stevia was "banned," here's the context: years ago, before sufficient safety review, U.S. regulators restricted stevia as a food additive, allowing it only as a dietary supplement. After evidence-based review, highly purified stevia extract earned its Generally Recognized as Safe status and entered the food supply. Regulations have varied by region over time, which is the source of much of the confusion.

Does stevia cause cancer?

Current research does not show that stevia causes cancer. In fact, the stevia plant contains an antioxidant called kaempferol that some studies associate with reduced risk of certain cancers. Stevia remains a relatively new sweetener, so research continues, but the evidence to date is reassuring.

Stevia vs. sugar, Splenda, and sugar alcohols

Because the body doesn't absorb steviol glycosides, stevia provides no calories and has a glycemic index of zero, so it doesn't raise blood glucose the way sugar does, which is why it's often recommended for diabetes management. Compared with artificial sweeteners like Splenda, stevia is plant-derived rather than chemically made. Sugar alcohols (erythritol, xylitol, sorbitol) are a different category and can cause digestive upset for some people. For a fuller picture of cutting back on sugar, see our guide to simple swaps for added sugar.

What to look for when buying stevia

Stevia comes in liquid, granulated, and powdered forms, and brands vary widely. Many add other ingredients to soften stevia's intense sweetness, sugar alcohols like erythritol (Truvia, Pyure), dextrose (Stevia in the Raw), or agave inulin (Wholesome Organic Stevia). Some liquid drops contain only purified water, stevia leaf extract, and natural flavors. Always check the ingredient list so you know exactly what you're getting.

The bottom line

Stevia is a natural, zero-calorie sweetener and a helpful tool for managing your glycemic index and weight. But remember, not all stevia products are equal, and a zero-calorie label is never a license to overdo it, the same balance applies to balanced desserts and the quality ingredients around it.