Blood sugar and gut
Fructose in food
Fructose is a simple sugar found naturally in fruits, vegetables, sugar cane, and honey. It is processed in the liver, and in excess it is stored as abdominal fat, can feed pathogenic bacteria and yeasts, and drives up blood sugar. Limiting it can help with gut dysbiosis, anxiety, thyroid issues, and blood sugar imbalance.
Why limit fructose?
Fructose is a monosaccharide that exists in foods as free fructose or combined with glucose as sucrose. It is metabolised in the liver, and research shows that excessive consumption can lead to liver stress similar to that seen in alcoholic liver disease. Excess fructose is stored as abdominal fat, can feed pathogenic bacteria and yeasts, and pushes blood sugar up.
Lower-fructose choices
Per typical serving. Lower Moderate
| Food | Serving | Fructose (g) |
|---|---|---|
| Limes | 1 medium | 0 |
| Lemons | 1 medium | 0.6 |
| Cranberries | 1 medium serve | 0.7 |
| Passionfruit | 1 medium | 0.9 |
| Prune | 1 medium | 1.2 |
| Guava | 2 medium | 2.2 |
| Date | 1 medium | 2.6 |
| Rockmelon | 1/8 melon | 2.8 |
| Raspberries | 1 cup | 3.0 |
| Kiwifruit | 1 medium | 3.4 |
| Blackberry | 1 cup | 3.5 |
| Cherries (sweet) | 10 | 3.8 |
| Strawberries | 1 cup | 3.8 |
| Pineapple | 1 slice | 4.0 |
| Honey | 1 teaspoon | 4.0 |
| Grapefruit | 1/2 medium | 4.3 |
| Tangerine | 1 medium | 4.8 |
Higher-fructose foods
Worth keeping an eye on, especially dried fruit. Higher
| Food | Serving | Fructose (g) |
|---|---|---|
| Nectarine | 1 medium | 5.4 |
| Peach | 1 medium | 5.9 |
| Orange | 1 medium | 6.1 |
| Papaya | 1/2 medium | 6.3 |
| Banana | 1 medium | 7.1 |
| Blueberries | 1 cup | 7.4 |
| Date (Medjool) | 1 medium | 7.7 |
| Apple | 1 medium | 9.5 |
| Watermelon | 1/16 melon | 11.3 |
| Pear | 1 medium | 11.8 |
| Raisins | 1/4 cup | 12.3 |
| Grapes | 1 cup | 12.4 |
| Mango | 1/2 medium | 16.2 |
| Apricots (dried) | 1 cup | 16.4 |
| Figs (dried) | 1 cup | 23 |
A single cup of dried figs carries roughly the equivalent of a whole day’s suggested fructose for a healthy adult. Fresh whole fruit, eaten with its fibre, behaves very differently from dried fruit or juice.
Frequently asked questions
How much fructose is too much?
A common guide is around 25 grams of fructose a day for a healthy adult, dropping to roughly 10 to 15 grams a day for someone with a relevant health condition. Fructose is a simple sugar found in fruit, vegetables, honey and sugar cane, and the liver processes it. In excess it can stress the liver in a way similar to alcohol, be stored as abdominal fat, feed pathogenic gut microbes, and push blood sugar up.
Is fruit bad because of fructose?
Not necessarily. Whole fresh fruit with its fibre behaves very differently from dried fruit or juice, because the fibre slows fructose absorption. The concentration is the issue: a single cup of dried figs can carry roughly a whole day's suggested fructose for a healthy adult. Lower-fructose choices per serve include limes, passionfruit, raspberries and strawberries, while higher-fructose options to watch include grapes, mango, watermelon and especially dried fruit.
Why does excess fructose affect the liver?
Fructose is processed mainly by the liver, and when intake is high the liver can become stressed in a way the resource compares to alcoholic liver disease, with excess fructose also being stored as abdominal fat. Beyond the liver, too much fructose can feed pathogenic bacteria and yeasts in the gut and push blood sugar up. Keeping fructose within sensible limits may therefore help with gut dysbiosis, blood-sugar balance and related issues.
Reviewed by Rohan Smith, BHSc Nutritional Medicine · Elemental Health & Nutrition, Adelaide. Last reviewed 13 June 2026.
Important: This summary is general information, not personalised medical advice, diagnosis, or a treatment protocol. Speak with a qualified practitioner about your individual situation. Book a consultation →