This Thyroid UK forum often discusses related issues - and this is one very big and important related issue! With interesting links among ME/CFS, fibromyalgia, thyroid and B12.
As so often, far too few subjects, etc. - but worth a read.
PLoS One. 2015 Apr 22;10(4):e0124648. doi: 10.1371/journal.pone.0124648.
Response to Vitamin B12 and Folic Acid in Myalgic Encephalomyelitis and Fibromyalgia.
Regland B1, Forsmark S1, Halaouate L1, Matousek M1, Peilot B1, Zachrisson O1, Gottfries CG1.
1 Gottfries Clinic, affiliated with Institute of Neuroscience and Physiology, Gothenburg University, Gothenburg, Sweden.
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.
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.
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.
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.
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.
[PubMed - as supplied by publisher]
Full paper freely available here:
[ Feel free to re-post elsewhere - e.g. the PAS forum. I shall only post it here. ]