Urinary calcium loss in elderly men on a vegetable:animal (1:1) high-protein diet.
Gerontology
; 45(5): 274-8, 1999.
Article
em En
| MEDLINE
| ID: mdl-10460989
ABSTRACT
BACKGROUND:
A high purified protein intake has been shown to induce urinary calcium loss. However, these findings could not be reproduced with a high-protein meat diet. Also, most studies have been carried out in young subjects and the applicability of their results to the elderly population on a mixed vegetableanimal diet remains unclear.OBJECTIVES:
To study whether a mixed vegetableanimal high-protein intake increases urinary calcium loss in elderly volunteers, as has been shown for younger subjects on a purified high-protein intake.METHODS:
Eight male volunteers, with ages ranging from 66 to 88 years, recruited from the University Hospital Geriatric Medicine Outpatients Clinic, were studied. 24-hour urinary calcium, phosphorus, and creatinine were measured during a period of usual protein intake (approximately 0.6 g/kg/day) and during 7 days of vegetableanimal (11) high-protein intake (2 g/kg/day). Calcium and phosphorus intake were adjusted to be kept constant (1 g/day of each) during the whole study.RESULTS:
Mean calcium urinary levels did not change significantly during the study (1.89 and 1.83 mmol/24 h during the usual and high-protein diet, respectively). Urinary phosphorus and creatinine levels also remained stable throughout the entire study.CONCLUSIONS:
This study has not detected any increased calcium urinary excretion in male elderly volunteers submitted to the mixed vegetableanimal high-protein diet. Therefore, it does not support the suggestion that a high-protein intake is a risk factor for urinary calcium loss in elderly men.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Proteínas Alimentares
/
Cálcio
Tipo de estudo:
Risk_factors_studies
Limite:
Aged
/
Aged80
/
Humans
/
Male
Idioma:
En
Revista:
Gerontology
Ano de publicação:
1999
Tipo de documento:
Article