Skip to main content

Thank you for visiting You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

Effect of consumption of a ready-to-eat breakfast cereal containing inulin on the intestinal milieu and blood lipids in healthy male volunteers


Objective: To investigate the effect of a breakfast cereal containing inulin on blood lipids and colonic ecosystem in normolipidemic young men.

Setting: Department of Food Science and Microbiology,University of Milan, Italy.

Subjects: Twelve healthy male volunteers, age 23.3±0.5 y, body mass index (BMI) 25.7±1.2 kg/m2 (mean±s.e.m.).

Interventions: Subjects consumed daily, for three periods of four weeks, 50 g of a rice-based ready-to-eat cereal (placebo) and the same cereal containing 18% inulin (test) in substitution of their habitual breakfast, then returned to the habitual diet (wash-out). They followed no other dietary restrictions.

Results: No changes in body weight, dietary habits, faecal and bile acid output, faecal short-chain fatty acid (SCFA) and faecal pH, were observed at the end of each period, whereas plasma total cholesterol and triacylglycerols significantly decreased at the end of test period by 7.9±5.4 (P<0.05) and 21.2±7.8% (P<0.005) respectively. Meal glucose tolerance test (MTT) resulted in the same incremental area under the curve for both cereals (IAUC test 124±35; placebo 118±33 mmol·min/l, ns). Inulin markedly enhanced breath H2 excretion (IAUC test 280±40; placebo 78±26 ppm·h, P<0.005), as well as faecal concentration of L-lactate. Total facultative anaerobes significantly decreased after test, and bifidobacteria increased after correction for total anaerobes (P<0.05). Changes in blood lipids were negatively correlated with bifidobacteria counts and positively with secondary bile acid excretion (P<0.05).

Conclusions: Inulin seems to have a lipid lowering potential in normolipidemic men possibly mediated by mechanisms related to colonic fermentation.

Sponsorship: National Research Council of Italy, grant number 95.00773.PF41.

Author information




Guarantors: Furio Brighenti and Enrica Canzi.

Corresponding author

Correspondence to F Brighenti.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Brighenti, F., Casiraghi, M., Canzi, E. et al. Effect of consumption of a ready-to-eat breakfast cereal containing inulin on the intestinal milieu and blood lipids in healthy male volunteers. Eur J Clin Nutr 53, 726–733 (1999).

Download citation


  • inulin
  • plasma lipids
  • fermentation
  • colonic microflora
  • bile acids

Further reading


Quick links