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l-carnitine causes headaches Benefits: A Complete Research-Based Guide Can Headaches Be a Sign
Description
A more recent RCT similarly compared PEG with lactulose for treatment of overt HE in 100 patients with post-hepatitis C cirrhosis admitted for HE

Mitochondrial DNA haplogroups influence the therapeutic response to riboflavin in migraineurs

PloS One (2014) 9:e104443

The test takes around 30 minutes

Riazi K, Raman M, Taylor L, Swain MG, Shaheen AA
