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Fructans are non-digestible carbohydrates that consist of fructose molecules and, usually, a glucose molecule at the end.

Short-chain fructans (2-9 fructose molecules) are known as fructooligosaccharides.

Long-chain fructans (>10 fructose molecules) are known as inulins.

Fructans naturally occur in foods, such as wheat, spelt, kamut, rye bran, onions, agave, artichokes, asparagus, leeks and garlic. Fructans can appear as thickeners in commercial foods, such as jams and yogurts.


  1. Fedewa A et al, 2014, Dietary fructose intolerance, fructan intolerance and FODMAPs  PubMed Central

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