Pain modulation in patients with fibromyalgia undergoing acupuncture treatment is associated with fluctuations in serum neuropeptide Y levels.
This is not a particularly new paper. I’ve somehow missed the data on Neuropeptide Y and its possible connection to acupuncture pain relief. https://www.ncbi.nlm.nih.gov/pubmed/28598785 Clin Exp Rheumatol. 2017 May-Jun;35 Suppl 105(3):81-85. Epub 2017 May 31. Pain modulation in patients with