l-carnitine in infant formula Karicare - From 0 to 6 Months it could be colic due to cows milk allergy Enfamil Neuropro Infant Formula -
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doi:10.1016/j.envres.2018.10.007

Luci S, Geissler S, Konig B, Koch A, Stangl GI, Hirche F, Eder K: PPARalpha agonists up-regulate organic cation transporters in rat liver cells

When you consume Creatine, it enters your muscles and gets converted into phosphocreatine (fancy science jargon, I know)
Dialysis-related carnitine disorder and levocarnitine pharmacology
