Circadian rhythmicity of circulating vitamin concentrations

R. B. Singh, M. A. Niaz, G. Cornelissen, K. Otsuka, J. Siegelová, B. Fišer, F. Halberg

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


The aim of the study was to assess whether circulating vitamin concentrations are circadian periodic, and if so, to estimate the phase relations among vitamins A, E, C, and beta-carotene. Plasma concentrations of vitamins A, E, and C, and of beta-carotene are circadian periodic, with peak values found in the early morning hours.

Original languageEnglish (US)
Pages (from-to)93-96
Number of pages4
JournalScripta Medica Facultatis Medicae Universitatis Brunensis Masarykianae
Issue number2
StatePublished - 2001


  • Circadian rhythmicity
  • Circulating vitamin concentrations
  • Vitamins A, E, C


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