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L-carnitine is a well-established dietary supplement that demonstrates potential to mitigate the onset and progression of MASLD
Although vitamin B12 injections may increase energy, restore memory, and improve quality of life for individuals with a deficiency, patients whose vitamin B12 levels are normal will not have improved health from this treatment.
Conflating the two in a study design would be a meaningful error a point covered further in our related article on common laboratory research mistakes
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