Q.What is called artificial sweetener ? Give an example.
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Artificial Sweeteners: Sweetness Without the Calories
Imagine you love the taste of sugar — that instant burst of sweetness on your tongue. But you also know that sugar brings calories, and too many calories can lead to weight gain, blood sugar spikes, and other health problems. What if you could get the sweetness without the calories? That's exactly what artificial sweeteners are designed to do.
The Core Idea
An artificial sweetener is a chemical compound that tastes intensely sweet — often hundreds or thousands of times sweeter than table sugar (sucrose) — but provides negligible or zero calories. Your taste buds perceive the sweetness, but your body cannot break down the molecule for energy, so it passes through without adding to your calorie intake.
The key distinction: natural sugars (glucose, fructose, sucrose) are carbohydrates that your body metabolises for energy. Artificial sweeteners are synthetic compounds that trigger the sweet taste receptor but are not metabolised for energy.
How Do They Work?
Your tongue has taste receptors for sweetness. Normally, when a sugar molecule binds to that receptor, it sends a signal to your brain: "Sweet!" Artificial sweeteners are shaped so precisely that they fit into the same receptor — often much more tightly than sugar does. That's why you need only a tiny amount to get the same sweetness.
Because the molecule is not a carbohydrate, your digestive enzymes cannot break it down. It either gets absorbed and excreted unchanged, or it passes through the gut without being absorbed at all. No breakdown means no calories.
Three Common Examples You Must Know
| Sweetener | Sweetness (vs sugar) | Calorie contribution | Key fact |
|---|---|---|---|
| Saccharin | ~300–500× sweeter | Zero | Oldest artificial sweetener; discovered in 1879. Used in soft drinks, table-top sweeteners. |
| Aspartame | ~200× sweeter | ~4 kcal/g (but used in tiny amounts) | Breaks down on heating, so not for cooking. Contains phenylalanine — dangerous for people with PKU (a genetic disorder). |
| Sucralose | ~600× sweeter | Zero | Made from sugar by replacing three hydroxyl groups with chlorine. Heat-stable, so can be used in baking. |
Aspartame is not calorie-free per gram — it has the same energy as sugar. But because it is 200 times sweeter, you use so little that the calorie contribution is negligible. This is a common exam trap.
The Chemistry Behind It
For a compound to taste sweet, it must fit into the sweet taste receptor (a protein called T1R2/T1R3). The "sweetness" is not a property of the molecule itself — it is a property of how the molecule interacts with the receptor.
Saccharin is a sulfonimide. Aspartame is a dipeptide (two amino acids linked together: aspartic acid and phenylalanine methyl ester). Sucralose is a chlorinated derivative of sucrose — the chlorine atoms prevent the body from breaking it down.
Sucrose (table sugar): C12H22O11
Sucralose: C12H19Cl3O8
The three chlorine atoms replace three hydroxyl (−OH) groups, making the molecule indigestible. …
Sugar substitutes are designed to give sweetness without the calories of ordinary sugar, and several synthetic compounds have been developed to do this. …
Artificial (synthetic) sweeteners give sweet taste without adding calories; a common example is saccharin.
An artificial sweetener is a man-made chemical compound used as a substitute for sugar (sucrose). It provides a sweet taste to food and drinks but is either not metabolised by the body or is used in such tiny amounts that it supplies negligible calories. This makes such sweeteners valuable for diabetic patients and for people who need to control their calorie/weight intake, since they do not raise blood sugar levels.
Common examples: …
- CBSE 2024Set ANNUAL1 markQ.Name the sweetening agent used in the preparation of sweets for a diabetic patient.
›Reveal solutionSolution
Sucralose is a non-caloric, heat-stable artificial sweetener, which is why it (unlike aspartame) is suitable for cooking sweets for diabetics.
Sucralose is a trisaccharide-derived artificial sweetener that is about 600 times sweeter than cane sugar, yet provides negligible calories and does not raise blood glucose, making it suitable for diabetic patients.
…
- CBSE 2024Set ANNUAL1 markMCQQ.Chlorine containing artificial sweetner which is stable at cooking temperature and has appearance like sugar is ...............................(a) Sucrolose(b) Saccharin(c) Aspartame(d) Alitame
›Reveal solutionSolution
Sucralose is the chlorine-containing artificial sweetener that is stable at cooking temperature and looks like table sugar.
Sucralose is made by selectively chlorinating sucrose (three -OH groups are replaced by chlorine atoms). Unlike saccharin and aspartame, sucralose does NOT decompose on heating, so it is safe to use in cooking and baking; it also has a white, crystalline, sugar-like appearance, so it can be used as a direct tabletop substitute for sugar. Saccharin and aspartame are also artificial sweeteners but …
- CBSE 2023Set F1 markMCQQ.Saccharin is a/an(a) Aliphatic hydrocarbon(b) Sweetening agent(c) Polynuclear compound(d) Sugar
›Reveal solutionSolution
Saccharin is an artificial sweetening agent — option (B).
Saccharin (o-sulphobenzimide) is the oldest artificial sweetener, roughly 550 times sweeter than cane sugar. It provides sweet taste without adding calories and is not metabolised, so it is used by diabetics and in low-calorie foods. …
- CBSE 2023Set ANNUAL1 markMCQQ.The artificial sweetener stable at cooking temperature and does not provide calories is(a) Alitame(b) Saccharin(c) Aspertame(d) Sucralose
›Reveal solutionSolution
Sucralose is the artificial sweetener specifically noted for being heat-stable enough to use in cooking, while providing no calories.
Sucralose is a trichloro derivative of sucrose. Because it passes through the body largely unmetabolised, it contributes no calories, and unlike aspartame (which breaks down and loses sweetness on heating, making it unsuitable for cooking), sucralose remai …
- CBSE 2022Set ANNUAL1 markMCQQ.The artificial sweetener which is used in cold foods and soft drinks is(a) BHT(b) Aspartase(c) Sodium benzoate(d) Ranitidine
›Reveal solutionSolution
Aspartame is the most widely used artificial sweetener in cold foods and soft drinks, but it is unstable to heat, so it cannot be used in cooking/baking.
Aspartame is methyl ester of a dipeptide formed from aspartic acid and phenylalanine. It is about 100 times as sweet as cane sugar. Its major limitation is that it decomposes on heating, so it is only suitable for use in cold foods and soft drinks, not for cooking or baked goods.
…
- CBSE 2022Set ANNUAL1 markQ.Name two artificial sweetening agents.
›Reveal solutionSolution
Artificial sweeteners provide the sensation of sweetness without contributing significant dietary calories.
Artificial sweetening agents are synthetic compounds that taste sweet (often many times sweeter than sucrose, gram for gram) but contribute little or no calorific value, and are used as a low-calorie substitute for sugar.
Examples:
- Saccharin — one of the oldest artificial sweeteners (about 550 times as sweet as cane sugar), excreted unchanged from the body, safe for diabetics. …
- CBSE 2021Set A1 markMCQQ.Which of the following is artificial sweetening agent?(a) Saccharin(b) Aspartame(c) Sodium cyclomate(d) All of these
›Reveal solutionSolution
Saccharin, aspartame and sodium cyclamate are all artificial sweeteners.
Artificial sweetening agents provide sweetness without adding calories (or with negligible calories) and are used especially by diabetic and calorie-conscious people.
- Saccharin — about 550 times sweeter than cane sugar; the first popular artificial sweetener. …
- CBSE 2020Set ANNUAL1 markQ.Why is the use of asprtame limited to cold foods and drinks ?
›Reveal solutionSolution
Aspartame breaks down on heating, so it can only be used where no cooking/baking temperatures are involved.
Aspartame is an artificial sweetener that is not very stable to heat — on prolonged heating it undergoes hydrolysis/decomposition, losing its characteristic sweetness (and altering into other, non-sweet products). Because of this thermal instability, aspartame is unsuitable for use in foods that require cooking or baking, and is instead restricted to cold foods and dri …
- CBSE 2018Set ANNUAL1 markQ.__________ is an artificial sweetner which is unstable at cooking temperature.
›Reveal solutionSolution
Aspartame is an artificial sweetener that is unstable at cooking/baking temperatures, so it is only suitable for use in cold foods and drinks.
Aspartame is a methyl ester of a dipeptide formed from aspartic acid and phenylalanine. It is about 100 times as sweet as cane sugar. However, it is not very stable at cooking/baking temperatures — on heating it decomposes and loses its sweetness — s …
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