Abstract:
BACKGROUND:Nocturnal eating have recently increased. Serum phosphorus levels and regulators of phosphorus have circadian variations, so it is suggested that the timing of eating may be important in controlling serum phosphorus levels. However, there have been no reports on the effects of nocturnal eating on phosphorus metabolism. The objective was to evaluate the effects of nocturnal eating on phosphorus metabolism. METHODS:Fourteen healthy men participated in two experimental protocols with differing dinner times. The design of this study was a crossover study. The subjects were served test meals three times (breakfast; 07:30 h, lunch; 12:30 h, dinner; 17:30 or 22:30 h) a day. Blood and urine samples were collected to assess diurnal variation until the following morning. RESULTS:The following morning, fasting serum phosphorus levels in the late dinner group were markedly higher than those in the early dinner group (p < 0.001), although serum calcium levels were maintained at approximately constant levels throughout the day in both groups. Fluctuations in urinary calcium excretion were synchronized with the timing of dinner eating, however, fluctuations in urinary phosphorus excretion were not synchronized. Urinary phosphorus excretions at night were inhibited in the late dinner group. In the late dinner group, intact parathyroid hormone levels didn't decrease, and they were significantly higher in this group compared with the early dinner group at 20:00 h (p = 0.004). The following morning, fasting serum fibroblast growth factor 23 levels in the late dinner group had not changed, but those in the early dinner group were significantly increased (p = 0.003). Serum free fatty acid levels before dinner were significantly higher in the late dinner group compared with the early dinner group. CONCLUSIONS:Our results indicate that nocturnal eating inhibits phosphorus excretion. It is suggested that nocturnal eating should be abstained from to manage serum phosphorus levels to within an adequate range.
journal_name
Nutr Jjournal_title
Nutrition journalauthors
Sakuma M,Noda S,Morimoto Y,Suzuki A,Nishino K,Ando S,Umeda M,Ishikawa M,Arai Hdoi
10.1186/s12937-015-0096-ysubject
Has Abstractpub_date
2015-10-08 00:00:00pages
106issn
1475-2891pii
10.1186/s12937-015-0096-yjournal_volume
14pub_type
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journal_title:Nutrition journal
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pub_type: 杂志文章,随机对照试验
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更新日期:2010-09-17 00:00:00
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pub_type: 杂志文章
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更新日期:2011-04-24 00:00:00
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更新日期:2020-03-24 00:00:00