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Does the inclusion of moderate amounts of red meat in the diet of exercising older women impact on faecal markers of bowel health, including faecal lactoferrin?

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conference contribution
posted on 2007-01-01, 00:00 authored by Stuart Smith, J Muir, David Cameron-Smith
Background: High intakes of red meat may be associated with increased risk of colorectal cancer (CRC), however, to determine CRC risk, it is important to assess faecal changes related to protein and carbohydrate metabolism.

Objective
: To determine the influence of three weekly meals rich in red meat as opposed to a carbohydrate control diet on faecal markers which are involved in the aetiology of CRC.

Design: Twenty post-menopausal women (aged 60-75) undertook, 3 times a week for 12 weeks, a 30 minute exercise session followed immediately by a cooked meal that was high in lean red meat, low in carbohydrate (n= 10) or low in lean red meat, high in carbohydrate (n=10). Dietary fibre intake and macronutrients were kept constant. At the beginning and end of the study, three-day faecal samples were collected and by-products of protein fermentation and carbohydrate metabolism, undigested fibre residues, and faecal output and colonic bacterial microbiota changes measured.

Outcomes: No significant differences were observed in subjects on either diet when comparing faecal output, faecal pH, other faecal markers, nor faecal lactoferrin. There was a trend observed in changes in the population of colonic microbiota using FISH analysis. Bacteroides spp. and Prevotella spp. appeared to decrease in women consuming a high red meat diet compared with an increase in women consuming a high carbohydrate diet.

Conclusions
: In this pilot study the trend in colonic microbiota change is interesting and suggests that dietary influence of colonic microbiota, especially changes in Bacteroidetes, may be indicative of risk of gut damage and disease compared to other faecal markers.

History

Location

Auckland, N.Z.

Open access

  • Yes

Start date

2007-12-05

End date

2007-12-08

ISSN

0314-1004

Language

eng

Notes

Abstract found in Asia Pacific Journal of Clinical Nutrition : Vol. 16(Suppl 3): S109 (http://apjcn.nhri.org.tw/server/APJCN/ProcNutSoc/2000+/2007/2007.htm)Every reasonable effort has been made to ensure that permission has been obtained for items included in Deakin Research Online. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au

Publication classification

E1.1 Full written paper - refereed

Copyright notice

2007, Nutrition Society of Australia

Title of proceedings

NZNS & NSA 2007 : Joint New Zealand Nutrition Society and Nutrition Society of Australia Annual Scientific Meeting

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