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Associations between usual food intake and fecal sterols and bile acids: Results from the KORA FF4 study.

Br. J. Nutr., accepted (2019)
Postprint DOI
Open Access Green
as soon as is submitted to ZB.
Animal sterols, plant sterols and bile acids in stool samples have been suggested as biomarkers of dietary intake. It is still unknown whether they also reflect long-term habitual dietary intake and can be used in aetiological research. In a subgroup of the KORA FF4 study, habitual dietary intake was estimated based on repeated 24HFL and a FFQ. Stool samples were collected according to a SOP and those meeting the quality criteria were extracted and analysed by means of a metabolomics technique. The present study is based on data from 513 men and 495 women with a mean age of 60 and 58 years, respectively, for which fecal animal and plant sterols and bile acids concentrations and dietary intake data were available. In adjusted regression models, the associations between food intake and log-normalised metabolite concentrations were analysed. Bonferroni correction was used to account for multiple testing. In this population-based sample, associations between habitual dietary intake and fecal concentrations of animal sterols were identified, while the impact of usual diet on bile acids was limited. A habitual diet high in 'fruits' and 'nuts and seeds' is associated with lower animal fecal sterols concentrations, whereas a diet high in 'meat and meat products' is positively related to fecal concentrations of animal sterols. A positive association between glycocholate and fruit consumption was found. Further studies are necessary for evaluation of fecal animal sterols as biomarkers of diet. The findings need to be confirmed in other populations with diverse dietary habits.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Bile Acids ; Dietary Intake ; Faeces ; Kora Ff4 ; Sterols
Reviewing status