What is Stevia (Steviol Glycosides)?
Steviol glycosides are the sweet-tasting compounds found naturally in the leaves of Stevia rebaudiana, a plant native to South America. Manufacturers extract, purify, and sometimes ferment specific glycosides — such as Rebaudioside A or Rebaudioside M — to produce a concentrated sweetener. The result is roughly 200 to 400 times sweeter than table sugar by weight.
What does it do in the product?
Steviol glycosides provide sweetness without contributing calories or raising blood glucose in the way that sucrose does. Food makers use them to reduce or replace sugar while keeping a product palatable. Because they are so potent, very small amounts are needed, which helps keep the ingredient list and cost lean.
Where you usually find it
- diet soft drinks and sparkling water
- low-sugar yogurts and dairy alternatives
- protein bars and meal-replacement shakes
- tabletop sweetener packets and drops
- reduced-sugar breakfast cereals
- flavoured teas and sports drinks
Is Stevia (Steviol Glycosides) something to worry about?
Regulatory bodies in both the US and EU have reviewed the safety data for highly purified steviol glycosides and concluded they are safe at typical dietary intakes. Some people notice a lingering bitter or liquorice-like aftertaste, particularly with certain glycoside fractions, though this is a sensory issue rather than a safety one. A small number of individuals report mild digestive discomfort at high intake levels, and people with ragweed or related plant allergies are occasionally advised to monitor their response, though cross-reactivity evidence remains limited.
Who should pay attention
- People with Asteraceae (daisy-family) plant allergies, as Stevia rebaudiana belongs to the same botanical family
- Anyone managing blood pressure with medication, since early research has explored stevia's potential blood-pressure effects — consult a healthcare provider
- People monitoring for digestive sensitivity, as high doses have been linked to bloating in some individuals
- Those following a strict low-FODMAP diet, as formulation details and added ingredients in stevia products can vary
- Pregnant or breastfeeding individuals who prefer to avoid less-studied additives, though current safety assessments have not flagged concerns at normal use levels
How is it regulated?
In the United States, the FDA has accepted several GRAS (Generally Recognized as Safe) notifications for highly purified steviol glycosides, meaning manufacturers can use them without separate pre-market approval, provided purity standards are met. The European Union authorises steviol glycosides under the E960 group in specific food categories, with acceptable daily intake limits set by EFSA. Both frameworks distinguish between high-purity extracts — which are permitted — and crude stevia leaf or raw extracts, which are not approved as food additives in either jurisdiction.
How to spot it on a label
On an ingredient list, stevia may appear as 'steviol glycosides', 'stevia leaf extract', 'Rebaudioside A', 'Reb M', or simply 'stevia'. In the EU, you may also see the E-number E960 followed by a letter designating the specific glycoside fraction. When the label lists both stevia and another sweetener such as erythritol, the two are typically used together to balance sweetness and mask bitterness.
What a cleaner swap looks like
If you prefer a minimally processed alternative, small amounts of raw honey, pure maple syrup, or date paste provide sweetness alongside trace minerals, though they do carry calories and raise blood sugar more than stevia does. For a zero-calorie option that some people find has a cleaner taste profile, monk fruit extract (luo han guo) is similarly plant-derived and carries a comparable safety record. Checking InZoRAH on a product can help you compare the full ingredient list and find options that match your priorities.