Two recent meta-analyses of randomized, placebo-controlled trials found no evidence that coenzyme Q 10 improved motor-related symptoms or delayed the progression of the disease when compared to placebo (68, 69)
BAs are synthesized in hepatocytes predominantly by the classic pathway, which is controlled by 7-hydroxylase (CYP7A1), and to a lesser extent by the mitochondrial alternative pathway, which is determined by the availability of cholesterol in the IMM for its metabolism by sterol 27-hydroxylase (CYP27A1)

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doi: 10.1111/j.1432-1033.1996.0008u.x