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This has led many functional medicine practitioners to seek alternative delivery methods that can bypass the destructive environment of the stomach and deliver the intact molecule directly to the cells that desperately need it

doi: 10.1093/brain/awq319

This study was supported in part by the Intramural Research Program of the National Center for Advancing Translational Sciences, National Institutes of Health

Head-to-head comparison The comparison page on injectable versus oral peptides breaks down these differences in even greater detail

Brain regions involved in fatigue sensation: reduced acetylcarnitine uptake into the brain