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American Journal of Clinical Nutrition, Vol 45, 725-729, Copyright © 1987 by The American Society for Clinical Nutrition, Inc

ORIGINAL RESEARCH COMMUNICATIONS

Effect of diet on plasma carnitine levels and urinary carnitine excretion in humans

G Cederblad

This investigation determines the effect of two isocaloric diet regimens on plasma carnitine and urinary carnitine excretion in man. Seven healthy men were served a high-carbohydrate, low-fat (C) or a low- carbohydrate, high-fat (F) diet for 2 wk, ie, one diet regimen for 4 d followed by a 3-d break and concluded with 4 d more on the other diet regimen. The two regimens contained the same amount of carnitine-rich food. Plasma free carnitine rose significantly from the initial value on F diet and was significantly higher from day 3 than C diet. Plasma acyl carnitine increased on both diets. Urinary excretion of carnitine increased only on F diet. Renal clearance of both free and acyl carnitine was significantly greater on F diet than on C diet. Results showed that composition of a diet with constant carnitine content influenced carnitine metabolism in man.


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Pharmacol. Rev., December 1, 2002; 54(4): 589 - 598.
[Abstract] [Full Text] [PDF]


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Copyright © 1987 by The American Society for Nutrition