Not all dietary fibers are equal. Inulin is a soluble dietary fiber classified as a fructan, a type of carbohydrate made up of fructose chains of varying lengths that end with a glucose molecule. Since human enzymes cannot digest inulin, it passes through the stomach and small intestine intact.

Inulin stands out because it is fully fermented in the large intestine by beneficial bacteria, such as bifidobacteria or lactobacilli. This stimulates a selective growth of these bacteria resulting in several positive health effects, qualifying inulin as a prebiotic.  

Inulin has been consumed since ancient times. Early humans ate large amounts of inulin, highlighting its long-standing importance in our diet. Naturally found in various fruits and vegetables, such as garlic, onions, leeks, artichokes and bananas, inulin is especially abundant in chicory root, which contains about 15-20%. Chicory is a plant with blue flowers, known for its inulin-rich roots, used as a popular coffee substitute in New Orleans and for its slightly bitter leaves in salads, especially in Europe. The high content of inulin in chicory root makes it ideal for commercial use, where inulin is added to processed foods to boost fiber levels and enhance nutrition.  

Almost 3 decades of extensive scientific work, including numerous human intervention studies, have confirmed the beneficial effects of inulin from chicory. Emerging research also shows the impact prebiotics have via the gut-brain axis. Our gut and brain are deeply connected, influencing everything from digestion to mood. Science confirms that prebiotic chicory root fiber (inulin and oligofructose) nourish the gut microbiota, leading to the production of beneficial compounds, such as short-chain fatty acids that impact not only gut health but also immune function, hormone regulation and even mood. By supporting this vital connection, inulin helps enhance overall well-being far beyond the digestive system. 

In addition to its prebiotic properties, inulin is valued for its ability to improve texture and mouthfeel, often serving as a fat substitute in food products. The chain length of inulin varies, making it more versatile for different food applications.  

Thanks to its unique properties, inulin supports various aspects of health, from digestion to weight management, immune function and more. Discover inulin’s proven health benefits.  

Other types of prebiotic fibers