Influences of sleep and the circadian rhythm on iron-status indices.

Abstract:

OBJECTIVES:The aim was to study the influence of sampling time, food intake and sleep on tests used to screen for and monitor conditions of iron deficiency and overload. DESIGN AND METHODS:The 24 h variations of iron, transferrin, transferrin saturation (TS) and ferritin were studied in seven healthy individuals during standardised food intake, and during night or day sleep. RESULTS:Iron and TS showed clear diurnal variations, with peaks at 12.6 h and 12.8 h respectively, during night sleep, and at 19.7 h and 19.3 h, respectively, during day sleep. Ferritin did not demonstrate any circadian variation. Transferrin and ferritin were unaffected by sleep-condition. Meals did not have any effect except a slight decline of transferrin. CONCLUSIONS:Time of day and sleeping patterns had great influence on iron and TS, whereas no or only minor effects are seen on the concentration of ferritin and transferrin. Meals have limited effects.

journal_name

Clin Biochem

journal_title

Clinical biochemistry

authors

Ridefelt P,Larsson A,Rehman JU,Axelsson J

doi

10.1016/j.clinbiochem.2010.08.023

subject

Has Abstract

pub_date

2010-11-01 00:00:00

pages

1323-8

issue

16-17

eissn

0009-9120

issn

1873-2933

pii

S0009-9120(10)00384-X

journal_volume

43

pub_type

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