Natural vs. artificial sweeteners
The split between "natural" and "artificial" sweeteners is part chemistry, part marketing. Neither word is tightly defined in US food law. This is a plain, sourced guide to what each term means, where the well-known sweeteners fall, and where the line genuinely blurs.
At a glance
What "natural" and "artificial" actually mean
The two words describe where a sweetener comes from — not how sweet it is, how many calories it carries, or how heavily it has been processed.
In everyday use, a natural sweetener is one derived from a plant or otherwise found in nature. Steviol glycosides come from the leaf of the stevia plant; mogrosides come from monk fruit; allulose is a rare sugar present in small amounts in figs, raisins and maple syrup. An artificial — or synthetic — sweetener is one built through chemical synthesis. Aspartame, sucralose, acesulfame potassium, saccharin and neotame are all made this way.
The line is blurrier than it looks. Sucralose is made from ordinary sugar, but the molecule is chemically altered, so it is classed as synthetic. Stevia and monk fruit reach the shelf as highly purified extracts, far removed from the raw leaf or fruit. Origin and processing are two different things, and "natural" speaks only to the first.
Why the label can mislead
Source does not determine how a sweetener behaves in the body or how many calories it contains. A purified plant extract and a lab-made molecule can both be hundreds of times sweeter than sugar, contribute no calories, and be heavily processed. US food law reflects this: the FDA has never formally defined "natural" for labeling, and it judges the safety of each sweetener on its own data — not by whether it is called natural or artificial. This page classifies by origin; it is not a verdict on safety or quality.
Where each sweetener falls
Grouped by origin. Sweeteners with a dedicated Zero Sugar Facts page are linked.
Plant-derived & found in nature
Derived from plants or naturally occurring — though most still reach the shelf as concentrated, purified ingredients. The sugar alcohols also occur in nature but are usually produced industrially, and the caloric "naturals" such as honey, maple syrup and agave are still sugars.
| Sweetener | What it is | Sweetness vs. sugar |
|---|---|---|
| Stevia | Purified steviol glycosides from the stevia leaf; in use under GRAS. | ~200–400× |
| Monk fruit | Purified mogrosides from monk fruit (luo han guo); in use under GRAS. | ~150–250× |
| Allulose | A rare sugar found in figs, raisins and maple syrup; made commercially from fructose. | ~70% as sweet |
Synthetic (artificial) high-intensity sweeteners
Made by chemical synthesis. All six FDA-approved high-intensity sweeteners are calorie-free or close to it; five have dedicated pages here. Advantame, the sixth, is little used and has no page.
| Sweetener | What it is | Sweetness vs. sugar |
|---|---|---|
| Aspartame | Built from two amino acids; loses sweetness when heated. | ~200× |
| Sucralose | Made from sugar, then chemically modified; heat-stable. | ~600× |
| Acesulfame potassium | Often blended with other sweeteners to round out taste. | ~200× |
| Saccharin | One of the oldest; in use since 1879. | ~200–700× |
| Neotame | Derived from aspartame; extremely potent, so used in tiny amounts. | ~7,000–13,000× |
How US regulation treats them
US food law does not use "natural" or "artificial" as a safety category. Every sweetener clears the same bar — reasonable certainty of no harm — by one of two routes.
A high-intensity sweetener is regulated either as a food additive, which requires FDA premarket review and approval, or under GRAS (generally recognized as safe), where qualified experts conclude a use is safe based on publicly available data. For each approved sweetener, an Acceptable Daily Intake — the amount considered safe to consume every day over a lifetime — is set by the FDA, or for steviol glycosides by the WHO/FAO expert committee.
| Route | Sweeteners |
|---|---|
| FDA-approved food additives | Saccharin, aspartame, acesulfame potassium, sucralose, neotame, advantame. |
| In use under GRAS | Certain steviol glycosides (stevia) and monk fruit extract. |
The ingredient list names the specific sweetener a product uses — that is the reliable detail. "Natural" on the front of the pack is a marketing term, not a defined nutritional or safety category.
Common questions
Is stevia a natural sweetener?
The sweetness comes from steviol glycosides purified from the stevia leaf, so the origin is a plant. The FDA permits these high-purity steviol glycosides in food under GRAS; crude or whole-leaf stevia extracts are not approved for use as sweeteners.
Is sucralose natural because it's made from sugar?
No. Sucralose starts from sugar but is chemically modified into a new molecule, so it is classed as a synthetic, or artificial, sweetener.
Are natural sweeteners healthier than artificial ones?
Origin alone does not determine that. The FDA evaluates each sweetener's safety on its own data rather than by whether it is natural or artificial, and a "natural" label says nothing about calories or how the body handles the sweetener.
Does "artificial" mean unsafe?
No. The artificial high-intensity sweeteners sold in the US are approved within an Acceptable Daily Intake — the amount considered safe to consume every day over a lifetime.
Selected sources
- US Food & Drug Administration — high-intensity sweeteners: the six approved food additives and the two plant-derived sweeteners in use under GRAS.
- US Food & Drug Administration — "natural" is not formally defined for food labeling.
- World Health Organization — 2023 guideline on the use of non-sugar sweeteners.
- Dietary Guidelines for Americans, 2025–2030 — guidance on added sugars and substitutes.
See how the sweeteners compare
Natural or artificial, the question most people are really asking is how these sweeteners stack up on calories, sweetness, glycemic impact and baking. See all twenty-one side by side.
Open the comparison hub →