Sorbitol: what it is, which foods contain it, and why it can cause symptoms

What is sorbitol?

It is a polyol, also called a sugar alcohol. Its molecule sits halfway between a sugar and an alcohol, and it has nothing to do with the alcohol in drinks. It occurs naturally in fruit from the rose family, such as pears, apples, plums, peaches, apricots and quinces. Industry also obtains it from glucose.

As an additive, it has its own number. Sorbitol is E-420, and sorbitol syrup is E-420(ii). It is used because it sweetens, withstands heat and extends a product’s shelf life. It also provides 2.4 kcal per gram, compared with 4 kcal for ordinary sugar [1].

Which foods contain sorbitol?

In three places. The first is fruit, where it occurs naturally and in very uneven amounts. The table below brings together foods and drinks so you can observe how they affect you. It is not for calculating grams of sorbitol.

Food	Form	Guidance
Pear	Fresh	Observe your tolerance
Plum	Fresh	Observe your tolerance
Peach	Fresh	Observe your tolerance
Apricot	Fresh	Observe your tolerance
Apple	Fresh	Observe your tolerance
Grapes	Fresh	Try according to your tolerance
Strawberries	Fresh	Try according to your tolerance
Raspberries	Fresh	Try according to your tolerance
Blueberries	Fresh	Try according to your tolerance
Prunes	Dried	Pay attention to the amount
Dried peaches	Dried	Pay attention to the amount
Dried apricots	Dried	Pay attention to the amount
Dried apple	Dried	Pay attention to the amount
Dried dates	Dried	Pay attention to the amount
Raisins	Dried	Pay attention to the amount
Apple juice	Juice	Observe your tolerance
Canned strawberries	Canned	Check the label
Redcurrant nectar	Nectar	Check the label
Elderberry juice	Juice	Check the label
Blackcurrant nectar	Nectar	Check the label
Canned raspberries	Canned	Check the label

The second is processed foods: sugar-free chewing gum, sweets and gummies, jams, ice cream, baked goods and much of what is sold as “light” or “no added sugar”. Sorbitol has been added to these, and in larger amounts.

The third is something almost nobody checks: medicines. Sorbitol must be listed in the package leaflet. According to the European Medicines Agency, above 140 mg per kilo of body weight per day, the leaflet also warns about digestive discomfort and a mild laxative effect [2]. Syrups and chewable tablets are the most common.

Which fruits can you try?

You can try raspberries, blueberries, strawberries or grapes and observe how they affect you. If a fruit bothers you, adjust the amount or choose another one, rather than routinely cutting out fruit altogether.

Take one precaution with dried fruit. It is easy to eat several pieces in a row, so pay attention to how much you have.

Is sorbitol bad for you?

No. It is an additive authorised in the European Union, and regulations even allow a positive claim about it. Replacing sugar with sorbitol causes a smaller rise in blood glucose and helps maintain tooth mineralisation [3]. That is why it is in so many chewing gums.

It does have a predictable effect, though. Above a certain amount, it loosens your stools, without this being an allergy or an illness. It is so predictable that the law takes it into account. Any food with more than 10% added polyols must warn that excessive consumption may produce laxative effects [1].

The useful question, then, is how much sorbitol you get from fruit, chewing gum and cough syrup combined.

How much sorbitol might make you feel unwell?

There is no single figure that predicts how much sorbitol will make you feel unwell. Tolerance differs from person to person and can vary depending on what you have that day.

Do not use one number on its own to decide what you can eat. Pay attention to the amount, your symptoms and whether other sources of sorbitol coincide.

A pear and a plum may coincide with chewing gum or syrups on the same day. Writing down what you have helps identify which combination bothers you.

Why does it bother some people but not others?

Because the small intestine has a limit to how much sorbitol it can absorb, and we all have that limit. The European breath-testing guideline explains that absorption capacity is limited, and large amounts remain unabsorbed even in healthy people [4].

What differs from one person to another is where that limit lies. What is not absorbed draws in water and is fermented by bacteria in the colon. This can cause bloating, rumbling, cramps and diarrhoea. Someone with a more sensitive gut, for example with irritable bowel syndrome, feels the same amount much more strongly.

It can also appear or worsen after gastroenteritis, untreated coeliac disease or a flare of inflammatory bowel disease, because the lining remains affected for a while. In that case, it usually improves once the underlying cause is resolved.

How can you tell if you have sorbitol intolerance?

The first step is to rule out something else. If you have warning signs, listed below, the European guideline calls for investigating them with blood tests, endoscopy or imaging before any breath test [4].

Next is the hydrogen breath test. You take a measured amount of the sugar, and the hydrogen in the air you breathe out is measured. What is not absorbed ferments, causing hydrogen levels to rise. It is the reference test for lactose and the one used for fructose.

There is a nuance about sorbitol that is almost never mentioned. The European guideline did not approve any recommendation on the clinical usefulness of sorbitol testing because there was not enough evidence [4]. The test exists, but it cannot diagnose you on its own. IgG, hair, bioresonance and kinesiology tests do not diagnose sorbitol intolerance either.

What can help, without a machine, is to remove sorbitol for a few weeks and then reintroduce it in an organised way, keeping a record of the amounts. That turns “fruit doesn’t agree with me” into “I can tolerate up to this amount”.

What if fructose also bothers you?

That often happens, and there is a reason. Fruits with more sorbitol also contain fructose. The European guideline puts them in the same group: sugars that the small intestine absorbs to a limited extent [4]. Many people searching for “fructose and sorbitol intolerance” really want to know how much fruit they can manage.

For fructose, the guideline does give a testing protocol. In adults, the dose may be 20 to 25 g of fructose [4]. Your doctor interprets the result together with your symptoms. You can find that part in the fructose intolerance guide.

Hereditary fructose intolerance is something else. It is a rare genetic condition in which sorbitol is avoided altogether because the body converts it into fructose. Package leaflets warn about this, and your specialist sets the guidance in that case [2].

If more foods bother you, such as onion, wheat, legumes or dairy, FODMAPs come into play. This is the group of fermentable carbohydrates that sorbitol belongs to [5]. The approach starts with a restriction lasting 2 to 6 weeks, followed by gradual reintroduction [5]. You can find the full approach in the low-FODMAP diet guide.

What mistakes do we see in consultations?

Cutting out all fruit. It is the first thing almost everyone does when pears bother them. Within a few weeks, fibre and vitamins may be lacking, when all that was needed was to switch fruit.

Counting fruit and forgetting everything else. Chewing gum, sugar-free sweets and syrup all add up too. They are often the missing piece that explains why something bothers you one day but not another.

Cutting out entire groups at once. Fruit goes first, then dairy, then bread, and the list keeps growing. What brings order is removing one specific food, in a specific amount and for a specific period.

Getting stuck in the elimination phase. If nobody has guided you through reintroduction after two months, the diet has stopped being a useful tool.