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The hypotensive response to oral fat is comparable but slower compared with carbohydrate in healthy elderly subjects

  • Renuka Visvanathan (a1) (a2), Michael Horowitz (a1) and Ian Chapman (a1)

Abstract

The objective of the present study was to determine the comparative hypotensive responses to drinks containing predominantly fat and carbohydrate (CHO) in healthy elderly subjects. Using a randomised, cross-over study, the participants, twelve elderly subjects, six of them female (72·2 (sd 5·7) years), were investigated. On three separate days, blood pressure (BP) and heart rate were measured following ingestion of 300ml drinks containing: (1) CHO (75g glucose and 93g Polyjoule (CHO polymer) providing 2732kJ (653kcal)); (2) 88% fat (cream blended with milk providing 2732kJ (653kcal)); (3) water. Systolic BP decreased following the CHO drink (P<0·001) and the high-fat drink (P<0·001) but not water; there was no difference in the magnitude of the decrease between the CHO drink and the drink containing fat (13·4v. 15·6mmHg). However, the onset of the fall was slower after the fat-containing drink (13·0v. 26·5min (P=0·01); area under the curve for 0–30min for CHO drink −6·5v. fat-containing drink 125·4 mmHg×min (P=0·043)). We conclude that ingestion of a high-fat drink results in a comparable fall in BP to a CHO drink although the onset is relatively slower. These observations may have implications for the management of postprandial hypotension.

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Copyright

Corresponding author

*corresponding author: Dr Renuka Visvanathan, fax 08 82228593, email renuka.visvanathan@adelaide.edu.au

References

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British Journal of Nutrition
  • ISSN: 0007-1145
  • EISSN: 1475-2662
  • URL: /core/journals/british-journal-of-nutrition
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