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Salt appetite in the elderly.

Khadeja Hendi1, Micah Leshem1

  • 1Department of Psychology,University of Haifa,Haifa3498838,Israel.

The British Journal of Nutrition
|October 8, 2014
PubMed
Summary
This summary is machine-generated.

Elderly individuals experience reduced thirst but maintain normal salt appetite, suggesting salt intake is not solely physiologically regulated. This intact salt appetite in older adults may help prevent hyponatremia.

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Area of Science:

  • Gerontology
  • Human Physiology
  • Nutritional Science

Background:

  • Aging is associated with physiological changes affecting fluid and electrolyte balance.
  • Thirst perception and regulation can be impaired in older adults.
  • The impact of aging on salt appetite and its relationship with mood requires further investigation.

Purpose of the Study:

  • To investigate age-related differences in salt appetite compared to thirst.
  • To determine if alterations in salt appetite are linked to mood in the elderly.
  • To explore the physiological regulation of salt appetite in aging.

Main Methods:

  • Comparison of elderly (65-85 years) and middle-aged (45-58 years) participants.
  • Assessment of thirst, taste psychophysics, dietary intake (Na, energy), and salting preferences.
  • Measurement of salt appetite, mood (Positive and Negative Affect Schedule), nocturia, and sleep patterns.

Main Results:

  • Elderly participants reported less thirst and responded less to thirst cues.
  • No age-related impairment in salt appetite was observed; dietary sodium intake adjusted for energy intake was similar.
  • No significant correlation was found between salt appetite measures and mood, nocturia, or sleep duration.

Conclusions:

  • Aging impairs thirst regulation but spares salt appetite, indicating salt appetite may not be solely physiologically regulated in humans.
  • Intact salt appetite in the elderly could be beneficial for preventing hyponatremia and improving overall appetite.
  • Further research could explore the clinical implications of preserved salt appetite in older populations.