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Response to vitamin B12 and folic acid in myalgic encephalomyelitis and fibromyalgia.

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ABSTRACT

BACKGROUND
 
Patients with myalgic encephalomyelitis (ME, also called chronic fatigue syndrome) may respond most favorably to frequent vitamin B12 injections, in vital combination with oral folic acid. However, there is no established algorithm for individualized optimal dosages, and rate of improvement may differ considerably between responders.
 
OBJECTIVE
 
To evaluate clinical data from patients with ME, with or without fibromyalgia, who had been on B12 injections at least once a week for six months and up to several years.
 
METHODS
 
38 patients were included in a cross-sectional survey. Based on a validated observer's rating scale, they were divided into Good (n = 15) and Mild (n = 23) responders, and the two groups were compared from various clinical aspects.
 
RESULTS
 
Good responders had used significantly more frequent injections (p<0.03) and higher doses of B12 (p<0.03) for a longer time (p<0.0005), higher daily amounts of oral folic acid (p<0.003) in good relation with the individual MTHFR genotype, more often thyroid hormones (p<0.02), and no strong analgesics at all, while 70% of Mild responders (p<0.0005) used analgesics such as opioids, duloxetine or pregabalin on a daily basis. In addition to ME, the higher number of patients with fibromyalgia among Mild responders was bordering on significance (p<0.09). Good responders rated themselves as "very much" or "much" improved, while Mild responders rated "much" or "minimally" improved.
 
CONCLUSIONS
 
Dose-response relationship and long-lasting effects of B12/folic acid support a true positive response in the studied group of patients with ME/fibromyalgia. It's important to be alert on co-existing thyroid dysfunction, and we suspect a risk of counteracting interference between B12/folic acid and certain opioid analgesics and other drugs that have to be demethylated as part of their metabolism. These issues should be considered when controlled trials for ME and fibromyalgia are to be designed.

Full text available here.

Editor's Note:  Watch for Celeste Cooper's upcoming article on the connection between fibromyalgia and thyroid dysfunction.  


 
Source:  Regland B, Forsmark S, Halaouate L, Matousek M, Peilot B, Zachrisson O, Gottfries CG. Response to vitamin B12 and folic acid in myalgic encephalomyelitis and fibromyalgia. PLoS One. 2015 Apr 22;10(4):e0124648. doi: 10.1371/journal.pone.0124648. eCollection 2015.

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