Understanding Sorbitol: A Natural Sugar Alcohol
Sorbitol, also known as glucitol, is a type of carbohydrate classified as a sugar alcohol or polyol. It is naturally produced by some fruits and can also be manufactured for use as a sweetener in packaged foods and medications. Sorbitol has a sweeter taste than glucose but contains about two-thirds the calories, making it a popular ingredient in many 'diet' and 'sugar-free' products. Unlike simple sugars, it is not completely absorbed by the small intestine. The unabsorbed portion travels to the large intestine where it is fermented by bacteria, a process that can cause gas, bloating, and diarrhea, especially in sensitive individuals. This is particularly relevant for those with Irritable Bowel Syndrome (IBS) or a specific sorbitol malabsorption.
The Top Contender: Prunes
When examining the sorbitol content across various fruits, dried prunes consistently stand out with the highest concentration. Prunes are simply dried plums, and the process of removing water dramatically concentrates the naturally occurring sorbitol. While fresh plums contain a moderate amount of sorbitol (around 2 g per 100g), prunes can have a content ranging from 11 g to nearly 15 g per 100g, depending on the source and specific preparation. This high level is the primary reason for their well-known natural laxative effect. Other dried fruits like apricots and pears also contain substantial amounts due to the same concentration effect.
Sorbitol Content in Common Fruits: A Comparative Table
For individuals managing their sorbitol intake, a comparison can be helpful. The following table provides typical sorbitol content per 100g for some of the most common fruits known to contain this polyol.
| Fruit (per 100g) | Sorbitol Content (grams) |
|---|---|
| Dried Prunes | 11 - 15 |
| Dried Apricots | ~6 |
| Dried Peaches | ~5 |
| Fresh Pear | ~3 |
| Fresh Cherry | ~2 |
| Fresh Plum | ~2 |
| Fresh Apple | 1.5 - 3 |
| Fresh Blackberry | ~4 |
| Fresh Peach | ~1 |
| Fresh Apricot | 1.3 |
It is important to note that these values can vary based on ripeness, cultivar, and other factors.
High-Sorbitol Fruit Groupings
Fruits can be broadly categorized by their sorbitol content. The stone fruits and pome fruits are particularly known for containing this sugar alcohol.
Stone Fruits (Prunus family)
- Cherries
- Apricots
- Peaches
- Plums
Pome Fruits (Apples and Pears)
- Apples
- Pears
Dried Fruit
- Prunes (dried plums)
- Dried apricots
- Dried pears
- Raisins
- Dates
The concentration effect in dried fruits means they should be approached with caution by those with intolerance. For example, dried apples can have double the sorbitol content of fresh apples.
Practical Dietary Considerations
Managing sorbitol intake is not just about avoiding fruit. Sorbitol (often labeled as E420) is widely used in the food industry as a sweetener and humectant. It can be found in many processed and packaged goods.
Hidden sources of sorbitol often include:
- Diet or sugar-free drinks
- Chewing gum and mints
- Sugar-free candies and sweets
- Baked goods as a humectant
- Some medications and cough syrups
For those with sorbitol intolerance or IBS, it is important to read product labels carefully. The amount of sorbitol that causes symptoms can vary greatly from person to person. A systematic approach, like the low FODMAP diet, can help identify individual tolerance levels.
Conclusion
In summary, while many fruits contain some amount of sorbitol, dried prunes have the highest concentration, making them the most significant fruit source of this polyol. The concentration process is key, as drying fruits like plums, apricots, and pears greatly increases their sorbitol content compared to their fresh counterparts. Awareness of these high-sorbitol fruits, in addition to common processed foods, is important for individuals managing a sorbitol sensitivity or following a low-FODMAP diet. Consulting a healthcare professional or registered dietitian for personalized advice is recommended to help identify triggers and develop a suitable nutrition plan.
How to Find Sorbitol Content Data
For those interested in detailed, specific data, authoritative resources can be very helpful. One such resource is the Food Standards Australia New Zealand database, which provides specific sorbitol content values for various foods.