Daily rhythm of NaCl intake in rats fed low-Ca2+ diet: relation to plasma and urinary minerals and hormones.


To assess daily rhythms of salt appetite, we measured spontaneous 300 mM NaCl intake of male Sprague-Dawley rats fed a diet containing 150 or 25 mmol Ca2+/kg. Both groups drank most NaCl at night, but, as the dark period progressed, intakes of controls remained constant or diminished, whereas intakes of rats fed low-Ca2+ diet increased. During the late dark… (More)


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