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Carnitine function and requirements during the life cycle.

C J Rebouche1

  • 1Department of Pediatrics, University of Iowa, Iowa City 52242.

FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology
|December 1, 1992
PubMed
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L-Carnitine is conditionally essential, especially for infants and those with chronic diseases. While not definitively proven in healthy individuals, supplementation may benefit specific populations with low carnitine levels.

Area of Science:

  • Nutritional Science
  • Biochemistry
  • Human Physiology

Background:

  • L-Carnitine is considered a conditionally essential nutrient.
  • Certain populations, including infants and individuals on long-term parenteral nutrition, may have increased carnitine requirements.
  • Evidence for carnitine deficiency includes low circulating levels and altered metabolite concentrations.

Purpose of the Study:

  • To evaluate the evidence for L-Carnitine's essentiality in different human populations.
  • To determine if a functional carnitine deficiency exists in nonpathologic individuals.
  • To assess the potential benefits of carnitine supplementation in specific clinical conditions.

Main Methods:

  • Review of existing literature on L-Carnitine concentrations and clinical outcomes.

Related Experiment Videos

  • Analysis of data regarding metabolite profiles in relation to carnitine levels.
  • Examination of growth data and anecdotal reports in populations with suggested carnitine requirements.

    • Main Results:

    • Exogenous L-Carnitine is necessary to maintain normal plasma carnitine concentrations across all age groups.
    • A functional carnitine deficiency, defined by clinical symptoms correctable by carnitine, has not been demonstrated in a generally healthy population.
    • Carnitine supplementation may offer benefits for very premature infants and individuals with chronic diseases.

    Conclusions:

    • L-Carnitine's essentiality is conditional, with specific groups potentially benefiting from supplementation.
    • Further research is needed to establish clear criteria for functional carnitine deficiency in nonpathologic states.
    • Carnitine intervention shows promise for infants and patients with age-related chronic diseases associated with low carnitine levels.