Dozens of substances are sweeter than table sugar, and the most potent one, advantame, is 20,000 times sweeter. The list spans lab-made compounds, plant extracts, and even rare proteins found in tropical rainforest fruits. Here’s how they compare and what makes each one different.
The Sweetness Scale at a Glance
Sweetness is measured relative to sucrose (ordinary table sugar), which sits at a baseline of 1. Everything on this list triggers the same sweet taste receptor on your tongue but does so with far less material. A tiny fraction of a gram of the strongest sweeteners can match the sweetness of an entire spoonful of sugar.
From the FDA’s published sweetness intensity data, here’s how the major players stack up:
- Advantame: 20,000 times sweeter
- Neotame: 7,000 to 13,000 times sweeter
- Thaumatin (protein): 2,000 to 3,000 times sweeter
- Saccharin: 200 to 700 times sweeter
- Sucralose: 600 times sweeter
- Stevia (steviol glycosides): 200 to 400 times sweeter
- Monk fruit (luo han guo): 100 to 250 times sweeter
- Aspartame: 200 times sweeter
- Acesulfame potassium (Ace-K): 200 times sweeter
The Most Intense Synthetic Sweeteners
Advantame holds the top spot. Approved by the FDA as a food sweetener, it is roughly 20,000 times sweeter than sugar. To put that in perspective, the amount needed to sweeten a cup of coffee would be invisible to the naked eye. It’s chemically related to aspartame but far more potent, and because so little is needed, it contributes essentially zero calories.
Neotame comes next at 7,000 to 13,000 times sweeter. It’s sold under the brand name Newtame and is used commercially in processed foods and beverages. The reason neotame punches so far above aspartame’s weight has to do with its molecular shape. It has an extra nonpolar branch that fits snugly into a pocket on the sweet taste receptor, creating stronger contact with the protein and locking the receptor into its “active” position more effectively. That tighter molecular grip translates directly into a more intense sweet signal from a smaller amount.
Sucralose, the sweetener in Splenda, lands at about 600 times sweeter than sugar. Saccharin, one of the oldest artificial sweeteners, ranges from 200 to 700 times sweeter depending on concentration. Aspartame and acesulfame potassium both sit around 200 times sweeter and are commonly blended together in diet sodas because their flavor profiles complement each other.
Natural Plant Sweeteners
Stevia and monk fruit are the two plant-derived sweeteners you’ll find most often on grocery store shelves. Stevia comes from the leaves of a South American shrub, and its active sweet compounds (steviol glycosides) are 200 to 400 times sweeter than sugar. Different glycosides within the leaf vary in sweetness and aftertaste, which is why some stevia products taste cleaner than others.
Monk fruit, also called luo han guo, is a small melon native to southern China. Its sweet compounds (mogrosides) are 100 to 250 times sweeter than sugar. Like stevia, monk fruit extract contributes no calories. Both sweeteners are sold as “natural” alternatives, though the extracts you buy are heavily processed and refined from the raw plant material.
Sweet Proteins From Tropical Plants
Some of the most fascinating substances sweeter than sugar are proteins, not small molecules. Seven sweet proteins have been identified so far, and all come from plants growing in tropical rainforests in West Africa and Southeast Asia.
Thaumatin and monellin share the top rank at roughly 3,000 times sweeter than sugar on a weight basis. Thaumatin comes from the fruit of a West African plant called the “miracle berry” (not to be confused with miraculin, a different protein). Monellin comes from the serendipity berry found in the same region. Brazzein, extracted from the fruit of a West African climbing plant, clocks in at about 2,000 times sweeter. Curculin (550 times), pentadin (500 times), and mabinlin (100 times) round out the group.
These proteins are unusual because most proteins don’t taste sweet at all. They activate the same taste receptor as sugar but through a different binding mechanism, wrapping around parts of the receptor that small molecules can’t reach. Their commercial use has been limited because proteins break down when heated and can lose sweetness at high temperatures or in acidic conditions. Thaumatin has found some niche use as a flavor enhancer in certain foods and is the only sweet protein with significant commercial production.
How Your Tongue Detects All of Them
Every sweet substance on this list activates the same receptor on your taste buds: a two-part protein complex that acts like a molecular clamp. When a sweet molecule lands in the binding pocket of this receptor, the clamp snaps from an open (inactive) shape to a closed (active) one, sending a “sweet” signal to your brain.
What separates a 200x sweetener from a 20,000x sweetener is how tightly and completely the molecule fills that pocket. Aspartame, for instance, anchors itself through a few key contact points. Neotame has the same anchoring points plus an additional branch that creates extra contact with the receptor walls, which is why it triggers a much stronger response. The more completely a molecule stabilizes that closed, active shape, the sweeter it tastes per gram.
Rare Sugars: Slightly Less Sweet, Fewer Calories
Not everything on the “sweeter than sugar” list is hundreds of times more intense. A category called rare sugars includes molecules that are chemically similar to table sugar but occur naturally in only tiny amounts. Tagatose, for example, delivers about 92% of sugar’s sweetness while containing roughly 60% fewer calories. It behaves more like real sugar in cooking and baking, which makes it appealing as a partial replacement rather than a zero-calorie substitute.
Allulose is another rare sugar gaining popularity. It tastes about 70% as sweet as sugar, so it’s actually less sweet, but it contributes minimal calories and doesn’t spike blood sugar. These rare sugars won’t show up on a “sweeter than sugar” list in the traditional sense, but they fill an important gap for people who want something that tastes and cooks like sugar without the full caloric load.
Cooking and Heat Stability
If you plan to bake with a sugar substitute, heat stability matters. Aspartame breaks down at high temperatures and loses its sweetness, which is why it works in cold beverages but not in cookies. Sucralose was long considered heat-stable, but more recent research has raised concerns. Studies now indicate that sucralose breaks down during cooking and baking at typical oven temperatures, potentially generating unwanted chlorinated byproducts.
Stevia and monk fruit extracts generally hold up better in heat, though the sweetness profile can shift at very high temperatures. Sweet proteins like thaumatin lose their structure when heated, which destroys the sweetness entirely. For baking, rare sugars like tagatose and allulose tend to perform closest to real sugar because they caramelize and contribute to browning in ways that high-intensity sweeteners simply cannot.
Do They Help With Weight Loss?
The intuitive logic is straightforward: replace sugar with a zero-calorie sweetener and you consume fewer calories. In practice, the evidence is murkier. The World Health Organization released a guideline advising against using non-sugar sweeteners as a strategy for weight control, citing a lack of long-term benefit for reducing body fat. Short-term calorie reduction doesn’t consistently translate into sustained weight loss in the studies reviewed, and some observational data suggests regular sweetener use may be associated with other metabolic risks over time.
This doesn’t mean these sweeteners are dangerous in normal amounts. It means swapping sugar for sweeteners alone, without other dietary changes, is unlikely to move the needle on weight. They’re a tool, not a solution.