Does Fruit Fructose Make You Gain Weight? How It Differs from the Fructose in “果糖ぶどう糖液糖” (High-Fructose Corn Syrup), and a Comparison of Sugar and Fiber in 22 Fruits

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On the back of soft drinks you often see “果糖ぶどう糖液糖” (high-fructose corn syrup, literally “fructose-glucose liquid sugar”). You may have come across the claim that fructose is bad for the body.

Yet the sweetness of fruit also comes from fructose. The government sets a goal of eating 200 g of fruit a day.

If it is the same fructose, why is fruit recommended while sweet drinks are to be cut back?

In this article, we check the following against government documents and papers:

• Whether the fructose in fruit and the fructose in liquid sugar or table sugar differ as substances
• What research shows about the differences inside the body
• A summary of human studies comparing fruit, 100% fruit juice, and sweet drinks
• A comparison of sugars, fructose, fiber, vitamin C, and potassium in 22 fruits and in juices
• How to read the back label of fruit juice drinks and dried fruit

Conclusions

• The fructose in fruit and the fructose in 果糖ぶどう糖液糖 are the same fructose as a substance. The difference is “how much, how fast, and together with what.”
• Fruit contains fiber and water and is chewed, so even the same amount of sugar enters the body more slowly than a drink. Human trials have confirmed that when you eat a whole apple, it leaves the stomach more slowly and feels more filling than when you drink it as juice
• In a summary of studies that examined fruit, juice, sweet drinks, and so on separately, taking sweet drinks on top of calories raised body weight, liver fat, uric acid, and fasting insulin. By contrast, no such bad changes were seen with fruit, and some results pointed toward lower body weight and blood pressure (however, most of the studies were of moderate to low quality, and this research group also declares funding from the sugar and beverage industries and others)
• For 100% fruit juice, results differ by study. In a large US follow-up study, fruit itself was associated with a slightly lower risk of type 2 diabetes, while juice was associated with a slightly higher risk. WHO includes the sugars in fruit juice among the “free sugars” that should be reduced
• In a Japanese study (the JPHC Study), the relationship that people who eat more fruit have less type 2 diabetes was not seen. We cannot go so far as to say “fruit prevents diabetes”
• No public body has decided “which fruit is best.” What the government recommends is quantity rather than type (200 g a day), and fruit itself rather than juice. The average for Japanese people is about 93 g, about half the goal

All fructose is the same substance

Table sugar and liquid sugar are both fructose and glucose

The sweetness of fruit comes mainly from three sugars: fructose, glucose, and sucrose (the same component as table sugar). Sucrose splits into glucose and fructose inside the body.

In other words, fruit, table sugar, and 果糖ぶどう糖液糖 are all combinations of “fructose and glucose.” There is no special fructose that exists only in fruit.

What differs is the proportions and amounts, and what comes along with them. Comparing per 100 g in the food composition table gives the following:

(MEXT, Standard Tables of Food Composition in Japan 2020 (Eighth Revised Edition), Supplement 2023. The composition table has no value for the dietary fiber of cola)

果糖ぶどう糖液糖 is itself a mass of sugar. In drinks it is diluted with water, and in cola there is about 12 g of sugar per 100 g.

The fructose in one apple is about 60% of that in 500 ml of cola

In terms of amount, the fructose in fruit is not small either.

• One medium apple (edible portion about 200 g): about 25 g of sugar, of which about 18 g is fructose (including the part that splits off from sucrose), and about 4 g of fiber
• 500 ml of cola (calculated as 100 ml = 100 g): about 60 g of sugar, of which about 30 g is fructose, and no fiber

Even one apple has about 60% of the fructose in 500 ml of cola. It is not the case that the fructose in fruit is “only a little, so it’s fine.” What makes the difference is the “way of taking it” described next.

Differences inside the body: what research shows

Fruit enters the body slowly

In a trial, people ate an apple raw, grated (puree), or as juice, with the same calories (178 kcal), and the stomach and intestines were examined by MRI (18 healthy adults, 2020).

• The time for half to leave the stomach was 65 minutes for the raw apple, 41 minutes for the puree, and 38 minutes for the juice
• Fullness was greater with the raw apple than with the juice

In an older 1977 trial (10 people), too, the juice could be finished 11 times faster than a whole apple, felt less filling, and was followed by a reaction in which blood sugar dropped too low afterward.

This means that removing fiber or breaking food down finely makes it easier to take in faster and in larger amounts. The e-Health Net (e-ヘルスネット) of the Ministry of Health, Labour and Welfare (MHLW) also explains that the fiber in fruit is said to help suppress sharp rises in blood sugar.

In small amounts, the small intestine handles it first (a mouse study)

Fructose has long been thought to be processed mainly in the liver. In 2018, a mouse study found that the small intestine processes about 90% of a small amount of fructose, so little of it reaches the liver. On the other hand, when a large amount of fructose was taken at once (1 g or more per kg of body weight), the small intestine could not handle it all, and it flowed into the liver and the large intestine.

A follow-up study in 2020 reported that, even with the same amount of fructose, the reaction that makes fat in the liver was stronger when it was drunk than when it was eaten. The researchers think problems arise when it is taken faster than the small intestine can process it.

This is a mouse study, and it has not been confirmed that the same thing happens in people as it is. Still, the idea that “even the same fructose is a greater burden on the body when it comes in fast and in large amounts” also fits the results of the human studies below.

Human studies: comparing fruit, juice, and sweet drinks

A summary of studies that examined foods separately

A group at the University of Toronto in Canada divided foods containing fructose into “sweet drinks,” “100% fruit juice,” “fruit,” “dried fruit,” and so on, and pooled the trial results for analysis (meta-analyses).

A distinctive feature is that they divide the trials into four by calorie condition. The most important is the distinction between trials where it was taken on top of the usual diet (calories increase) and trials where it replaced other foods (calories stay the same).

(From the abstracts of Choo 2018, Chiavaroli 2023, Lee 2022, Liu 2023, and Ayoub-Charette 2021. “On top” means trials that added calories to the usual diet, and “replacing” means trials that swapped in other foods with the same calories)

A summary of long-term follow-up studies (cohort studies) from the same group also found the following:

• Gout: Sweet drinks (2.08 times in the highest group) and fruit juice (1.77 times) carried a higher risk, and no relationship was seen with fruit (3 studies, about 150,000 people)
• Metabolic syndrome: The more sweet drinks, the higher the risk (1.14 times per 355 ml a day), while fruit was lower at 0.82 times per 80 g a day. Fruit juice was associated with lower risk at a moderate amount (125 ml a day) (13 studies)

Cautions when reading this research

• The certainty of the results (GRADE) is rated “moderate” to “low” for many of them
• Researchers in this group declare in their papers relationships with the sugar, beverage, and juice industries, such as the Coca-Cola Company (an unrestricted research grant), Tate & Lyle (a sugar and sweetener company), the Canadian Sugar Institute, and an expert panel of the European Fruit Juice Association. This does not contradict the fact that the conclusions are tough on sweet drinks and favorable to fruit and juice, but please keep it in mind as a premise when you read

Studies by other groups

• A large US follow-up study (about 190,000 people, 2013): For each 3 additional servings a week of fruit itself, the risk of type 2 diabetes was slightly lower at 0.98 times, and for fruit juice it was higher at 1.08 times. There were differences by type of fruit: lower for blueberries (0.74 times), grapes and raisins (0.88 times), and apples and pears (0.93 times), and higher for cantaloupe (1.10 times)
• A summary of studies on diabetes and drinks (17 cohorts, 2015): Sweet drinks raised type 2 diabetes by 18% per daily serving (13% after accounting for body size). Fruit juice was up 7%, but when restricted to studies that confirmed diabetes by testing, the relationship was unclear, and the researchers point to the possibility of bias
• Heart disease and stroke (64 studies, 2023): The more sweet drinks, the higher the risk, and the more fruit people ate, the lower the risk. Risk was lowest at about 200 g of fruit a day, and no further reduction was seen above 400 g
• A study of gout in US men (about 46,000 people, 2008): The more sweet soft drinks and fructose people took, the more gout, and there was a tendency for risk to be higher also with fruit juice and with fruits high in fructose (apples, oranges). For gout and fruit, results differ by study

Studies of Japanese people

• JPHC Study (about 48,000 people, 2013): For both vegetables and fruit together and fruit alone, the relationship that people who eat more have less type 2 diabetes was not seen
• NIPPON DATA80 (about 9,000 people followed for 24 years, 2015): People who ate the most vegetables and fruit combined had 0.74 times the risk of dying from heart disease, stroke, and the like compared with those who ate the least

Data on Japanese people are fewer than for Western populations, and data that isolate the effect of fruit alone are even more limited.

The government’s recommendation: 200 g a day, fruit rather than juice

Health Japan 21 sets “200 g a day”

The MHLW’s “Health Japan 21 (Third Term)” sets the goal for fruit intake for people 20 and over at 200 g a day (by fiscal 2032). In the Japanese Food Guide Spinning Top (食事バランスガイド), too, fruit is “2 servings” a day, and 1 serving is about 100 g of fruit.

The e-Health Net (MHLW) cites the following kinds of studies as grounds:

• With up to 200 g of fruit a day, the risk of death from stroke and coronary artery disease falls
• There are reports that about 200 g of fruit a day lowers the risk of high blood pressure, obesity, and type 2 diabetes

On the other hand, in the fiscal 2023 National Health and Nutrition Survey, fruit intake among people 20 and over was about 93 g on average. 63.4% of people ate less than 100 g, and 40.1% ate no fruit at all on the survey day.

WHO counts the sugars in juice as sugars to cut back

WHO defines the sugars added to food, and the sugars in honey, syrups, and fruit juice, as “free sugars,” and recommends keeping them to less than 10% of daily energy (ideally less than 5%). The sugars contained in raw fruit itself are not included.

Both the MHLW and WHO recommend fruit itself. Juice is not a substitute for fruit.

Comparing 22 fruits: sugar, fructose, fiber

We compared the amount and breakdown of sugars in each fruit using the food composition table. 100 g is the amount of 1 fruit “serving” in the Food Guide Spinning Top.

(Per 100 g of edible portion. “Of which fructose” is fructose plus the fructose that splits off from sucrose (about 53% of sucrose). The composition table includes estimated values. Watermelon is not included because the composition table has no breakdown of its sugars)

How to read the table

• Lower in sugar: Raspberry, strawberry, papaya, and grapefruit have about 7 g or less of sugar per 100 g
• Higher in fiber: Raspberry (4.7 g), blueberry (3.3 g), kiwi (green, 2.6 g), papaya (2.2 g)
• Higher in vitamin C: Kiwi (gold, 140 mg), kiwi (green, 71 mg), persimmon (70 mg), strawberry (62 mg), orange (60 mg)
• Higher in potassium: Banana (360 mg), melon (350 mg), kiwi (300 mg)
• More fructose than glucose: Apple, pears (Japanese and European), mango. If your stomach is sensitive, also see “People who should be careful” below
• Juice has almost no fiber: The amount of sugar is not very different from the fruit, and only the fiber is gone
• Raisins have about 60 g of sugar per 100 g: Because the water is gone, a small amount has a lot of sugar

There is no basis for saying “one particular fruit is best.” The fact that blueberries, grapes, and apples were named in the US study is a result within how people in the US eat, and does not mean that eating those fruits will prevent diabetes. Various fruits, raw, with about 200 g a day as a guide is the way of choosing that follows the government’s thinking.

If you want citrus delivered from where it is grown

Citrus such as mandarins, oranges, and grapefruit have 7 to 9 g of sugar per 100 g in the table and contain 32 to 60 mg of vitamin C. Here is a shop where you can have seasonal citrus delivered from where it is grown.

The same shop also sells mandarin juice and jelly. In the thinking of this article, we recommend raw fruit rather than juice.

If you want a variety of fruit delivered each season

One way to make “various fruits, raw” easier to keep up is a subscription that delivers seasonal fruit from farmers once a month. You pick one kind from each month’s options, and the fruit changes with the season (in October: persimmons, apples, grapes, and so on).

People who should be careful

• People with gout or hyperuricemia: When fructose is processed in the liver, it increases uric acid. In summaries of research the relationship between fruit and gout is unclear, but some studies found higher risk with juice and fruit high in fructose. Follow your doctor’s instructions on diet
• People who bloat easily and people with irritable bowel syndrome (IBS): The small intestine’s absorption of fructose has a limit, and with foods that have more fructose than glucose, fructose that cannot be absorbed ferments in the large intestine and can cause bloating and diarrhea. Some people have symptoms with apples, pears, mangoes, and others that the table marks as “More fructose than glucose”
• People being treated for diabetes, kidney disease, and the like: Follow your doctor’s or registered dietitian’s instructions on the amount and type of fruit (such as fruits high in potassium)

Points to check on the back label

Fruit juice drinks

Under the Food Labeling Standards, the name is determined by the percentage of juice.

On the ingredient list (原材料名) of juice-containing drinks, “果糖ぶどう糖液糖” and “砂糖” (table sugar) are often listed. Ingredients are listed in descending order by amount used, so if they come before the juice, there is more sugar than juice.

Even with 100% juice, the amount of sugar is almost the same as in the fruit, and there is almost no fiber.

Dried fruit

• Vegetable oil: Some raisins are coated with vegetable oil so the grains do not stick together. For example, the ingredient list (原材料名) of one California raisin on Rakuten Ichiba is “レーズン（レーズン（アメリカ産）、植物油脂）” (raisins (raisins (US-grown), vegetable oil)), and it is described as “coated all over with sunflower oil”
• Sugar: Some dried mangoes, cranberries, and others are dried with sugar added. Check for “砂糖” (sugar) on the ingredient list
• Products not coated with vegetable oil are often labeled “ノンオイル” (non-oil) or “植物油不使用” (no vegetable oil), but the sure way is to check whether the ingredient list is only fruit

Raisins whose only ingredient is grapes (Rakuten Ichiba)

These are raisins whose ingredient list (原材料名) is only dried grapes (no vegetable oil or sugar). Raisins have about 60 g of sugar per 100 g, so they suit being added in small amounts to yogurt or salads.

(Checked on the Rakuten Ichiba product pages on September 30, 2026. Prices and shipping may change.)

Note Raisins are not a substitute for 200 g of fruit. They have more sugar in a smaller amount than raw fruit.

How Urayomi sees it

• The fructose in fruit and the fructose in liquid sugar are the same substance. We cannot say “it’s natural fructose, so it’s good for you” or “it’s fructose, so it’s bad for you.”
• What shows up as a difference in research is amount, speed, and fiber. With sweet drinks, a lot of sugar comes in over a short time, without chewing
• Most of the research saying fruit is good is observational studies or trials of moderate to low quality. Among Japanese people, the relationship between fruit and diabetes is unclear
• The government recommends 200 g of fruit a day, but the Japanese average is about 93 g. To start, replacing sweet drinks and juice with fruit itself is a method that fits both the research results and the government’s policy

Summary

• Fructose is the same substance whether in fruit or in 果糖ぶどう糖液糖. Even one apple has about 60% of the fructose in 500 ml of cola
• The difference is that fruit has fiber and is chewed, so it enters the body slowly. An apple leaves the stomach more slowly than juice and feels more filling
• In the summaries of research, taking sweet drinks on top raised body weight, liver fat, and uric acid, and no bad changes were seen with fruit. However, the quality of the research is moderate to low, and ties to industry are declared
• For 100% juice, research results differ. WHO counts the sugars in juice as sugars to cut back
• There is no single “best” type of fruit. Sugar, fiber, vitamin C, and potassium differ by fruit, so use the table as a reference and eat various fruits, with about 200 g a day as a guide

Related: Article on isomerized sugar (how 果糖ぶどう糖液糖 is made and its raw materials) / Article on sweeteners / Grocery delivery comparison article (if you want fruit delivered)

Sources

• MEXT, “Standard Tables of Food Composition in Japan 2020 (Eighth Revised Edition), Supplement 2023” (main table and carbohydrate tables, updated March 27, 2026) https://www.mext.go.jp/a_menu/syokuhinseibun/mext_00001.html
• MHLW e-Health Net, “Recommendation of 200 g of fruit a day” (updated May 1, 2025) https://kennet.mhlw.go.jp/
• MHLW, “Health Japan 21 (Third Term)” list of goals
• MAFF, “200 grams of fruit every day!” https://www.maff.go.jp/
• MHLW and MAFF, “Japanese Food Guide Spinning Top”
• Consumer Affairs Agency, “Food Labeling Standards,” Appended Tables 3 and 4 (fruit drinks)
• WHO, “Guideline: Sugars intake for adults and children” (2015)
• Choo VL et al. (2018) BMJ (blood sugar). https://pubmed.ncbi.nlm.nih.gov/30463844/
• Chiavaroli L et al. (2023) Am J Clin Nutr (body weight). https://pubmed.ncbi.nlm.nih.gov/36842451/
• Lee D et al. (2022) Nutrients (liver fat). https://pubmed.ncbi.nlm.nih.gov/35889803/
• Liu Q et al. (2023) PLoS One (blood pressure). https://pubmed.ncbi.nlm.nih.gov/37582096/
• Ayoub-Charette S et al. (2021) J Nutr (uric acid). https://pubmed.ncbi.nlm.nih.gov/34087940/
• Ayoub-Charette S et al. (2019) BMJ Open (gout). https://pubmed.ncbi.nlm.nih.gov/31061018/
• Semnani-Azad Z et al. (2020) JAMA Netw Open (metabolic syndrome). https://pubmed.ncbi.nlm.nih.gov/32644139/
• Sun T et al. (2023) Adv Nutr (heart disease and stroke). https://pubmed.ncbi.nlm.nih.gov/36803836/
• Muraki I et al. (2013) BMJ (types of fruit and type 2 diabetes). https://pubmed.ncbi.nlm.nih.gov/23990623/
• Imamura F et al. (2015) BMJ (sweet drinks, fruit juice, and type 2 diabetes). https://pubmed.ncbi.nlm.nih.gov/26199070/
• Choi HK et al. (2008) BMJ (soft drinks, fructose, and gout). https://pubmed.ncbi.nlm.nih.gov/18244959/
• Kurotani K et al. (2013) Br J Nutr (JPHC Study). https://pubmed.ncbi.nlm.nih.gov/22571826/
• Okuda N et al. (2015) Eur J Clin Nutr (NIPPON DATA80). https://pubmed.ncbi.nlm.nih.gov/25585600/
• Aune D et al. (2017) Int J Epidemiol (fruit, vegetables, and mortality). https://pubmed.ncbi.nlm.nih.gov/28338764/
• Krishnasamy S et al. (2020) J Nutr (apple, puree, juice, and gastric emptying). https://pubmed.ncbi.nlm.nih.gov/32805050/
• Haber GB et al. (1977) Lancet (fiber and satiety). https://pubmed.ncbi.nlm.nih.gov/71495/
• Jang C et al. (2018) Cell Metab (fructose processing in the small intestine). https://pubmed.ncbi.nlm.nih.gov/29414685/
• Jang C et al. (2020) Nat Metab (small intestine and fatty liver). https://pubmed.ncbi.nlm.nih.gov/32694791/
• Douard V, Ferraris RP (2013) J Physiol (fructose transporters). https://pubmed.ncbi.nlm.nih.gov/23129794/