Profiling of phenols in human faecal water after raspberry supplementation

C.I.R. Gill, G.J. McDougall, S.M. Glidewell, D. Stewart, Q. Shen, K. Tuohy, A. Dobbin, A. Boyd, E. Brown, S. Haldar, I.R. Rowland

    Research output: Contribution to journalArticlepeer-review

    45 Citations (Scopus)


    The phenolic compositions of fecal water samples from ten free-living human subjects without marked dietary restrictions were monitored before and after intake of raspberry puree (200 g/day, 4 days) using gas chromatography-mass spectrometry. No single phenolic component was increased in all subjects after intake, but a majority of subjects had significant elevations in phenylacetic acid (7/10), 4-hydroxyphenylacetic acid (6/10), 3-hydroxyphenylacetic acid (5/10), 3-phenylpropionic acid and 3-(4-hydroxyphenyl)propionic acid. The levels of 3,4-dihydroxbenzoic acid were elevated in 8/10 subjects, significantly for 6 subjects (p < 0.05), and not significantly reduced in the other 2 subjects. In addition, unlike most other fecal metabolites, the increase was always >2-fold. This metabolite may be representative of the increased colonic dose of cyanidin anthocyanins. The colonic microbiota varied greatly between individuals, and supplementation with raspberries did not produce any statistically significant alterations in the profile of colonic bacteria, nor was a common pattern revealed to account for the interindividual variations observed in the fecal water phenolic profiles.
    Copyright © 2010 American Chemical Society
    Original languageEnglish
    Pages (from-to)10389-10395
    Number of pages7
    JournalJournal of Agricultural and Food Chemistry
    Issue number19
    Publication statusPublished - 2010


    • raspberries
    • fecal water
    • microbiota
    • phenolics
    • anthocyanins


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