side effect of l carnitine injection acetyl-l-carnitine Levocarnitine (oral route, intravenous route)

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Moreover, pomegranate nearly doubled the activity of paraoxonase-1 (PON-1), an antiatherogenic enzyme that optimizes HDL function and protects lipids from oxidative damage

They are different characteristics

And to get back to the point here, the original poster mentions a low B12 level and receiving treatment for same, but not taking any additional B vitamins so the simplest explanation here is that they are experiencing neurological damage from B12 deficiency, rather than anything to do with B6