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Plant and Cell Physiology.2013;54:12171227

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[ref] Carnitine: The study on mice showing that carnitine transport is essential for GLP-1 RA effectiveness indicates that low carnitine levels may impair weight loss.[ref] More studies are needed, but it may be that adding supplemental carnitine could help, especially if you have genetic variants related to lower carnitine levels

This makes oral administration an interesting choice for those dealing with stress-induced GI dysfunction or inflammatory bowel conditions linked to mood disorders
