Free Sugars: What the Term Means and How It Differs From Added Sugar
Author: Ukrainian Psychological Hub · Published: September 29, 2026 · Editorial Policy
Free sugars are a public-health category of sugars, not a special kind of sugar molecule. Under the World Health Organization (WHO) definition, the term covers monosaccharides and disaccharides added to foods or drinks by a manufacturer, cook, or consumer, plus sugars naturally present in honey, syrups, fruit juices, and fruit juice concentrates. Sugars naturally present inside intact fruit and vegetables and sugars naturally present in milk are outside that WHO category.
This is why a bottle of 100% fruit juice can contain free sugars even when its U.S. Nutrition Facts label says 0 g Added Sugars. “Free sugars” and “Added Sugars” answer related but different questions. WHO uses free sugars mainly for population nutrition guidance; the U.S. Food and Drug Administration (FDA) uses Added Sugars as a defined Nutrition Facts labeling category. The categories overlap substantially, but they are not interchangeable.
Free Sugars: The Definition in Plain English
The easiest way to understand free sugars is to separate the chemistry from the classification. Chemically, foods may contain sucrose, glucose, fructose, lactose, maltose, and other sugars. Public-health definitions then classify those sugars according to where they come from and how they are present in a food.
WHO defines free sugars as sugars added to foods and beverages by the manufacturer, cook, or consumer, together with sugars naturally present in honey, syrups, fruit juices, and fruit juice concentrates. The current WHO healthy-diet guidance continues to use this framework and specifically notes that fruit juice can contain substantial amounts of free sugars even when no sugar has been added.
The European Food Safety Authority (EFSA) uses essentially the same high-level concept: free sugars include added sugars plus sugars naturally present in honey and syrups and in fruit and vegetable juices and juice concentrates. EFSA separately distinguishes total dietary sugars, which also include sugars naturally present in intact fruit, vegetables, and milk.
The word “free” therefore does not mean “free of calories,” “unbound in a chemical sense,” or “sugar floating freely in the bloodstream.” It is terminology used in nutrition science and public-health guidance.
Free sugars are not a chemical species
The same molecule can fall into different dietary categories depending on its source and food context. Sucrose added to a cookie is a free sugar. Sucrose naturally contained within the intact cellular structure of a piece of fruit is not classified as free sugar under the WHO definition. Fructose in whole fruit and fructose in fruit juice are chemically fructose, yet the public-health classification differs.
For the underlying chemistry, see Sucrose: What It Is and How It Differs From Glucose and Fructose and Simple Sugars: What They Are and How They Differ From Starches.
What Counts as Free Sugar?
Under the WHO framework, the following are straightforward examples of free sugars:
• Table sugar, brown sugar, cane sugar, dextrose, glucose syrup, invert sugar, and other mono- or disaccharides when they are added during manufacturing, cooking, or at the table.
• Sugars naturally present in honey.
• Sugars naturally present in syrups, including products such as maple syrup and agave syrup.
• Sugars naturally present in fruit juice and vegetable juice.
• Sugars naturally present in fruit juice concentrates and vegetable juice concentrates.
• Sugars in foods and drinks that come from those free-sugar ingredients.
The source matters more than whether the sweetener sounds refined, raw, traditional, natural, organic, artisanal, or plant-based. A “natural” origin does not remove honey or syrup from the free-sugars category.
What Does Not Count as Free Sugar?
The clearest exclusions in the WHO definition are sugars naturally present in intact fruit and vegetables and sugars naturally present in milk. Examples include:
• The fructose, glucose, and sucrose naturally present inside a whole apple, orange, grape, or other intact fruit.
• Sugars naturally present inside intact vegetables.
• Lactose naturally present in plain milk and dairy products.
These exclusions do not mean that every food containing naturally occurring sugar is nutritionally identical. They mean that the public-health category “free sugars” was defined to distinguish certain sources and forms of sugar from sugars occurring within intact foods or milk.
For a broader source map, see Where Does Sugar Come From? Cane, Beets, Fruits, and Milk.
Free Sugars vs Added Sugar: The Short Answer
Free sugars are generally the broader public-health concept. Added sugars are sugars introduced into foods or drinks during processing, preparation, or at the table; free sugars include those added sugars and also include specified sugars that can be naturally present in honey, syrups, fruit juices, and juice concentrates.
That distinction is especially important in the United States because “Added Sugars” is also a specific FDA regulatory label category. The FDA definition of Added Sugars includes sugars added during processing, foods packaged as sweeteners such as table sugar, sugars from syrups and honey, and sugars from concentrated fruit or vegetable juices, subject to detailed labeling rules. It excludes naturally occurring sugars in milk, fruits, and vegetables.
So the useful rule is: free sugars and FDA Added Sugars overlap heavily, but the terms belong to different frameworks and cannot be substituted for each other in every food-labeling situation. A separate comparison of WHO and FDA definitions is its own search intent; here the essential point is that WHO’s free-sugars category explicitly captures sugars in 100% fruit juice even when the U.S. product has no Added Sugars declaration.
For the full definition-by-definition comparison, see Free Sugar vs Added Sugar: WHO and FDA Definitions Explained.
Free Sugars vs Total Sugars
Total sugars is the broadest of these three concepts. It counts all mono- and disaccharides present in a food or diet, regardless of whether they were added or naturally occurring. The conceptual nesting is therefore useful: total sugars contains naturally occurring sugars plus categories that may be classified as added or free sugars.
On a U.S. Nutrition Facts label, Total Sugars includes naturally occurring sugars and Added Sugars. The FDA explicitly explains that the line “Includes X g Added Sugars” sits underneath Total Sugars because the added-sugar grams are already part of the total; they are not extra grams to be added again. The dedicated label comparison Total Sugar vs Added Sugar: What Nutrition Labels Mean explains that nested relationship and the %DV logic in detail. See our Sugar Nutrition Facts: Calories, Carbohydrates, and Added Sugars for the broader U.S. label structure.
A scientific review of sugar terminology by Mela and Woolner emphasizes the practical importance of distinguishing total, added, and free sugars. The molecules themselves do not reveal which policy category they belong to; the classification depends on source and processing context.
Why Fruit Juice Counts but Whole Fruit Does Not
This is the example that makes the free-sugars concept click for many readers. WHO excludes sugars naturally present within intact fruit from free sugars, while it includes sugars naturally present in fruit juice and juice concentrates.
The distinction reflects food form and public-health use rather than a claim that fructose changes chemical identity when fruit is juiced. Whole fruit retains its cellular structure and typically comes with fiber, water, chewing, and a food matrix that shape eating rate and satiety. Juice changes that structure and can deliver the sugars of several pieces of fruit in a drinkable form.
WHO’s 2026 healthy-diet fact sheet states that fresh, frozen, and canned fruit can be good choices when added sugars are not present, while noting that most fruit juices, including those without added sugars, contain significant amounts of free sugars whose intake should be limited.
The correct conclusion is therefore categorical and practical: whole fruit sugar is generally outside the WHO free-sugars definition; fruit-juice sugar is inside it. That difference does not require treating whole fruit as “sugar-free,” nor does it turn juice into the same thing as a soft drink in every nutritional respect.
For the dedicated juice-level treatment of natural sugar, WHO free sugars, FDA Added Sugars, concentrate rules, and serving-size math, see Sugar in Juice: Natural Sugar, Free Sugars, and Serving Size.
Honey, Maple Syrup, Agave, and Other Natural Sweeteners
Honey and syrups are free sugars under WHO’s definition even when nothing has been added to them. This often conflicts with everyday language because people use “added sugar” to mean “someone poured sugar into this product.” Regulatory and public-health categories work differently.
In the United States, FDA also treats single-ingredient sugars and syrups as contributors to Added Sugars for labeling purposes, but the display rules are designed so a jar of pure honey or maple syrup does not misleadingly imply that a second sweetener was added to it. The FDA’s current Added Sugars guidance and industry resources on single-ingredient sugars and syrups explain these special display rules.
Words such as raw, organic, natural, unrefined, nectar, or plant-based can shape expectations, but they do not by themselves determine whether a sugar is free sugar. The relevant question is the definition being applied and the source or form of the sugars.
Does Milk Sugar Count as Free Sugar?
Lactose naturally present in milk and dairy products is not free sugar under the WHO definition. Plain milk can therefore contain Total Sugars while containing no free sugars from its naturally occurring lactose.
That distinction is another reminder that Total Sugars is not a synonym for free sugars. If a dairy product contains sweeteners added during manufacturing, those added sugars can count as free sugars even though the naturally occurring lactose does not.
For the chemistry and labeling of milk sugar, see Lactose: What It Is and Why Milk Sugar Is Different.
Smoothies, Purees, Dried Fruit, and Other Edge Cases
The high-level WHO definition is clear about added sugars, honey, syrups, juices, juice concentrates, intact fruit and vegetables, and milk. More processed fruit and vegetable forms create operational edge cases, and national authorities may use more detailed working definitions to estimate free-sugar intake.
A useful example is the UK working definition published by Public Health England. Swan and colleagues expanded the practical classification used for national dietary surveillance to include sugars naturally present in smoothies, fruit and vegetable purees, pastes, powders, and extruded products, while generally excluding sugars in most dried, stewed, canned, and frozen fruit and vegetables unless processing has moved the product into one of the included forms.
This does not mean every jurisdiction has an identical rule for every puree, powder, or composite food. When a question turns on an edge case, the authority matters. “WHO free sugars,” “UK free sugars,” and a manufacturer’s U.S. Added Sugars calculation should not be silently collapsed into one universal algorithm.
How Free Sugars Appear on U.S. Nutrition Facts Labels
They generally do not appear as a separate line. The U.S. Nutrition Facts label reports Total Sugars and Added Sugars. It does not report “Free Sugars.”
The FDA explains that Total Sugars contains both naturally occurring and added sugars, while Added Sugars is shown in grams and as percent Daily Value. For a 2,000-calorie reference diet, the Daily Value for Added Sugars is 50 grams. This Daily Value is a U.S. labeling reference and should not be substituted for WHO’s separate free-sugars recommendation.
The word “Includes” is important. If a label says “Total Sugars 15 g” and “Includes 7 g Added Sugars,” the product has 15 g total sugar, of which 7 g is added sugar. It does not contain 22 g of sugar.
To understand ingredient sources, the Nutrition Facts panel can be paired with the ingredient list. Our Names for Sugar: Common Terms on Food and Ingredient Labels explains common sugar terms that can appear there.
Can you calculate free sugars from a U.S. food label?
Not reliably in every case. A standard U.S. label can tell you Total Sugars and Added Sugars, and the ingredient list can identify many sugar sources. But WHO free sugars can include naturally occurring sugars in 100% juice even when the FDA Added Sugars value is zero. The label therefore does not always provide enough information to reconstruct an exact WHO free-sugars gram value.
For some foods the estimate is straightforward. In a sugar-sweetened soda whose sugars are all added sweeteners, the Added Sugars value and free-sugars amount may be very close or identical. In a mixed product containing fruit juice, intact fruit, dairy, and added sweeteners, exact free-sugars quantification may require formulation data not available to the shopper.
“No Added Sugar” Is Not the Same as “No Free Sugars”
A “no added sugar” claim addresses whether sugars or qualifying sugar-containing ingredients were added under the applicable labeling rules. It does not automatically tell you whether a food contains WHO free sugars.
The cleanest example is 100% fruit juice. It may contain no Added Sugars under U.S. labeling while its naturally occurring juice sugars count as free sugars under WHO guidance. The claim can therefore be true without the product being free of free sugars or free of Total Sugars.
This is where wording can create a health halo. A claim that removes one negative-sounding attribute may cause consumers to infer broader health advantages that the claim itself does not establish. A systematic review by Talati and colleagues found that health claims can improve product evaluations in ways that depend on the surrounding nutrition information. The practical response is to read the claim together with the Nutrition Facts panel, serving size, ingredients, and the overall food context.
Why Public Health Uses the Free-Sugars Category
The category was designed for public-health guidance, particularly around dental caries and excess energy intake. WHO’s 2015 guideline recommends that adults and children reduce free sugars to less than 10% of total energy intake and suggests a further reduction below 5% for additional benefits. These are population-level recommendations, not individualized treatment instructions.
The dental-health evidence is especially direct. WHO’s 2025 sugars and dental caries fact sheet identifies free-sugar consumption as a major risk factor for dental caries. The systematic review by Moynihan and Kelly found moderate-quality evidence that caries is lower when free-sugar intake is below 10% of energy, while evidence around the lower 5% threshold was more limited in quality.
Body-weight evidence also supports attention to dietary sugar in the context of energy intake. In a systematic review and meta-analysis, Te Morenga, Mallard, and Mann found that reducing dietary sugars in adults eating ad libitum was associated with a modest reduction in body weight, while increasing sugars was associated with weight gain; when sugars were exchanged isocalorically for other carbohydrates, body weight did not differ significantly. That pattern supports energy balance as an important mechanism rather than a claim that every gram of sugar has a unique weight-gain effect independent of calories.
EFSA’s large 2022 scientific opinion on dietary sugars concluded that available data did not allow a tolerable upper intake level or a universally safe intake level to be set for total, added, or free sugars. EFSA nevertheless advised that added and free sugars should be as low as possible within a nutritionally adequate diet, while acknowledging uncertainty across specific chronic-disease outcomes. This is an example of why evidence status matters: authoritative bodies can agree that lower intake is desirable while using different methods and recommendation structures.
The Psychology of Sugar Labels
Sugar labels do more than transmit numbers. They ask people to understand nested categories, percentages, serving sizes, ingredient terminology, and claims while making a purchase decision. That creates several predictable comprehension problems.
Added Sugars can be mistaken for extra sugar
Because Added Sugars appears beneath Total Sugars, some readers initially interpret the two lines as separate amounts that should be added together. FDA uses the word “Includes” specifically to show that Added Sugars is part of Total Sugars. A randomized experiment by Khandpur, Graham, and Roberto found that the format used to display added sugars affects consumer understanding; formats that supplied interpretive context such as percent Daily Value improved comprehension relative to a grams-only presentation.
A clearer label can improve understanding without determining behavior
In another randomized experiment, Khandpur, Rimm, and Moran found that the revised U.S. Nutrition Facts label improved participants’ ability to locate and understand Added Sugars compared with the older total-sugars-only label. Purchase intentions did not shift uniformly across products. This distinction matters: better label comprehension is evidence about understanding, not proof that one label format consistently changes purchasing or eating behavior.
Serving size changes the meaning of the number
Nutrition information is reported per serving. If the package contains multiple servings, the sugar amount for the amount actually eaten can differ substantially from the printed per-serving number. A systematic review by Brown and colleagues found that nutrition and health information on labels can influence portion size in different directions depending on label type and context, with no single universal effect.
Naturalness and claim framing can create a broader impression
Terms such as natural, raw, organic, no added sugar, fruit-based, or made with honey can influence expectations before the nutrition panel is read. That does not make these labels inherently misleading; it means a narrow factual claim can become a cue for a broader judgment. The safest interpretation is literal: determine exactly what the claim says, then check Total Sugars, Added Sugars, serving size, and ingredients separately.
A Practical Framework for Reading Sugar Information
For general label literacy, this sequence avoids most category errors:
• First, identify the framework. Is the statement using WHO free sugars, FDA Added Sugars, Total Sugars, or an ingredient claim?
• Second, read the serving size before interpreting grams or percent Daily Value.
• Third, remember that Added Sugars is included within Total Sugars on U.S. labels.
• Fourth, scan the ingredient list for added sweeteners, honey, syrups, juice concentrates, and other relevant sugar sources.
• Fifth, do not assume that 0 g Added Sugars means 0 g free sugars. Juice is the classic counterexample.
• Sixth, do not assume that the word natural means a sweetener is outside the free-sugars category.
• Seventh, avoid inventing an exact free-sugars number when the label does not provide enough formulation information.
This framework is about understanding labels and definitions. It is not a substitute for individualized medical or dietary advice, and it does not turn ordinary dietary sugar questions into blood-glucose management.
Evidence Status: What Is Established, What Is Limited, and What Is Often Misstated
Established
The WHO and EFSA definitions clearly include added sugars plus sugars naturally present in honey, syrups, fruit juices, and juice concentrates. WHO excludes sugars naturally present in intact fruit and vegetables and milk from the free-sugars category. The FDA Nutrition Facts label uses Total Sugars and Added Sugars rather than a Free Sugars line. Controlled label studies show that presentation affects comprehension, and systematic-review evidence supports a relationship between free-sugar intake and dental caries.
Context-dependent or authority-dependent
Processed fruit forms such as smoothies, purees, pastes, powders, and extruded fruit require attention to the definition being used. The UK has an explicit operational framework for these forms, while WHO’s high-level definition is less granular. Exact estimation of free sugars in composite foods can require recipe or formulation data.
Commonly misstated
Free sugar is not a distinct molecule. “Natural sugar” is not automatically outside the free-sugars category. 100% fruit juice can contain free sugars without Added Sugars. Added Sugars should not be added numerically on top of Total Sugars. A U.S. Nutrition Facts label does not always reveal exact WHO free-sugar grams. And the existence of free-sugars guidance does not mean every food containing any free sugar has the same nutritional role, serving pattern, or health effect.
Frequently Asked Questions
What are free sugars?
Free sugars are sugars added to foods or drinks by manufacturers, cooks, or consumers, plus sugars naturally present in honey, syrups, fruit juices, and fruit juice concentrates under the WHO definition.
Are all added sugars free sugars?
At the high-level public-health definition, added sugars fall within free sugars. However, FDA Added Sugars is a detailed U.S. regulatory category, so exact classifications and calculations should follow the relevant authority rather than assuming the terms are legally identical everywhere.
Is sugar in whole fruit a free sugar?
Not under the WHO definition when the sugars remain naturally present within intact fruit. Whole-fruit sugars still count toward Total Sugars, but they are not classified as free sugars.
Is sugar in 100% fruit juice a free sugar?
Yes under the WHO definition. This remains true even when no sugar was added and a U.S. label therefore reports 0 g Added Sugars.
Is honey a free sugar?
Yes. WHO explicitly includes sugars naturally present in honey within free sugars.
Are maple syrup and agave syrup free sugars?
Yes under the WHO framework because syrups are included. Their plant origin or “natural” positioning does not remove their sugars from the category.
Is lactose in plain milk a free sugar?
No. Lactose naturally present in milk and milk products is outside the WHO free-sugars definition. Sugars added to a flavored dairy product are a separate matter.
Does “no added sugar” mean there are no free sugars?
No. A product can have no Added Sugars and still contain free sugars. Unsweetened 100% fruit juice is the clearest example.
Can I find free sugars on a U.S. Nutrition Facts label?
Not as a dedicated line. U.S. labels report Total Sugars and Added Sugars. You can often infer whether some free-sugar sources are present from the label and ingredient list, but exact WHO free-sugar grams cannot always be calculated from consumer-facing information alone.
Are sugar alcohols free sugars?
Sugar alcohols, also called polyols, are a separate class and should not be treated as free sugars simply because their names may end in “-ol” or they provide sweetness. The UK operational definition explicitly excludes polyols such as sorbitol from free sugars.
Are non-sugar sweeteners free sugars?
No. Non-sugar sweeteners are not sugars and belong to a separate category. Their health evidence and regulatory treatment should be assessed substance by substance rather than folded into a free-sugars definition.
How much free sugar does WHO recommend?
WHO recommends reducing free sugars to less than 10% of total energy intake for adults and children and suggests reducing them below 5% for additional benefits. These are population public-health recommendations; personal dietary needs can depend on age, health, energy requirements, and clinical context.
Related Articles
References
Brown, H. M., Rollo, M. E., de Vlieger, N. M., Collins, C. E., & Bucher, T. (2018). Influence of the nutrition and health information presented on food labels on portion size consumed: a systematic review. Nutrition Reviews, 76(9), 655–677. https://doi.org/10.1093/nutrit/nuy019
European Food Safety Authority Panel on Nutrition, Novel Foods and Food Allergens. (2022). Tolerable upper intake level for dietary sugars. EFSA Journal, 20(2), e07074. https://doi.org/10.2903/j.efsa.2022.7074
Food and Drug Administration. (2026). Added Sugars on the Nutrition Facts Label. https://www.fda.gov/food/nutrition-facts-label/added-sugars-nutrition-facts-label
Khandpur, N., Graham, D. J., & Roberto, C. A. (2017). Simplifying mental math: Changing how added sugars are displayed on the Nutrition Facts label can improve consumer understanding. Appetite, 114, 38–46. https://doi.org/10.1016/j.appet.2017.03.015
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