What is stevia? Reading E960 and sweetener blends

Stevia can mean a plant, purified sweet compounds obtained from that plant, or a commercial product made with those compounds. A large “stevia” claim on the front of a pack does not tell you what the entire product contains. To compare products, read the ingredient list alongside the serving instructions and nutrition information.

This matters most when comparing powders, tablets and drops. Their packaging may share a familiar plant name while their formulations serve quite different purposes. Start with the practical question “What is in this particular product?” before trying to interpret broader claims about naturalness or health.

The plant and the food additive are different starting points

Stevia leaves and a purified steviol glycoside preparation are not interchangeable descriptions. Labels may name steviol glycosides, steviol glycosides from stevia, or a more specific member of the E960 family. The exact wording helps identify the substance being used.

The 2010 EFSA opinion in our research archive assesses preparations meeting defined specifications. It establishes an acceptable daily intake of 4 mg per kilogram of body weight per day, expressed as steviol equivalents. That unit is essential: it is not a limit expressed in grams of an unspecified supermarket powder.

You cannot convert that figure into teaspoons without knowing the formulation and the relevant conversion to steviol equivalents. Nor is an ADI an amount people should aim to consume. It is a tool used in safety assessment, with a defined substance and exposure context.

Why a stevia product may contain other ingredients

An intense sweetener can be used in a very small quantity. Commercial preparations may therefore include other ingredients to provide bulk or make measuring easier. Check the list for ingredients such as erythritol, other polyols or maltodextrin rather than assuming the brand name describes the whole mixture.

Consider two deliberately simplified examples:

• Product A lists erythritol and steviol glycosides.
• Product B lists maltodextrin and steviol glycosides.

Both might highlight stevia on the front, but the ingredient lists do not describe the same formulation. One contains a polyol; the other contains a digestible carbohydrate. These are examples of how to read a label, not current formulations attributed to any brand.

The same approach applies to drops. Check what accompanies the sweetener and how the manufacturer defines a serving. One drop from one bottle is not automatically equivalent to one drop from a different bottle. A claim about the sweetener itself also does not describe every ingredient in the finished preparation.

Safety assessment does not establish a weight-loss benefit

A toxicological assessment asks a different question from a nutrition guideline about long-term weight management. The WHO guideline on non-sugar sweeteners explicitly says it does not replace established safety guidance on individual sweeteners.

WHO's recommendation concerning weight control is conditional and excludes people with pre-existing diabetes from its stated population scope. Reading that document as a declaration that stevia is poisonous would misrepresent it. Reading a food-additive safety assessment as proof that a stevia product causes weight loss would also go beyond the evidence.

A biscuit made with a sweetener may still contain substantial energy from flour and fat. A product's nutritional role therefore needs to be considered at the level of the whole food, its portion and how it is used. The name of one ingredient cannot answer all three questions.

A practical comparison for powders, tablets and drops

Choose a single use before comparing packages. Are you sweetening one cup of coffee, buying a tabletop preparation, or following a recipe? Then put the following information side by side:

1. The exact sweetener name, including an E number where shown.
2. All accompanying ingredients.
3. The manufacturer's serving definition.
4. Nutrition information for that serving.
5. Directions and any warnings printed on the pack.

Comparing only per-100-gram figures can obscure ordinary use when products have different concentrations. Looking only at a very small serving can obscure differences through rounding. Use both views and keep their purposes separate: one helps compare formulations; the other helps understand the amount you actually use.

When a mixture contains erythritol, our guide to erythritol evidence addresses a different set of questions. If it contains maltodextrin, the distinction between carbohydrate and sugars is more directly relevant. Neither ingredient acquires the properties of steviol glycosides simply by being mixed with them.

What the front of the pack cannot establish

The presence of stevia does not establish that a finished food is suitable for every person or every purpose. It does not identify all possible allergens, disclose an unlisted ingredient quantity or show that a product can be consumed without limits. Those conclusions require information beyond a front-of-pack word.

If the amount of steviol glycosides is central to your decision and the packaging does not disclose it, record that as an information gap. Do not borrow the concentration from a different brand's website. Even a tablet and powder sold under the same brand may need separate checks.

A useful shopping note contains the full product name, format, serving instructions and ingredient list. This makes it easier to spot reformulations later. It also prevents an old screenshot of a label from quietly becoming your reference for a different product size or variety.

When asking a manufacturer a question, make it specific: request the information missing from the label and identify the product variant. “How much of the named sweetener is present per stated serving?” is more useful than asking whether the product is simply good or bad. Keep any answer with the product details it actually describes.

Sources and reading notes

• EFSA: safety of steviol glycosides, 2010.
• WHO: use of non-sugar sweeteners guideline.
• WHO: recommendation scope and conditional status.

This article explains label interpretation. Check the package in your hand for the current formulation; ingredients and serving instructions can change.