l carnitine side effects skin L-Carnitine Benefits, Sources, and L-Carnitine is an amino acid
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High doses taken orally can build up waste products in the blood for those on dialysis
Is L-Carnitine suitable for vegetarians and vegans

However, oral bioavailability is much lower than injectable, meaning the doses are higher (3 mg, 7 mg, and 14 mg tablets compared to the 0.25 to 2.4 mg injectable range)

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Bowyer JF, Clausing P, Gough B, Slikker W Jr, Holson RR
