l carnitine molecule Acetylcarnitine L- Carnitine | Sunland Nutrition
Description
Drink lots of fluids, especially water

Therefore, complete endogenous carnitine biosynthesis occurs only in these tissues (kidney, liver, and brain), which can also form L-carnitine using -butyrobetaine imported from other cells that do not contain -butyrobetaine dioxygenase [40, 41]

Nirmala JG, Lopus M

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I hope you have the wisdom to distinguish between the two
