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Weight loss surgery patients in particular, are at increased risk of developing vitamin B12 deficiency because their digestive tracts have been altered in such a way as to interfere with the natural absorption of this vitamin

suffers from conditions like renal or hepatic impairment

Tingling or numbness in your feet

People take certain medications, such as those for acid reflux or diabetes

54 More support for this connection comes from a clinical trial in which 69 menopausal women, 32 of whom had fibromyalgia, experienced improvements in sleep, quality of life, and fibromyalgia symptoms after 12 weeks of hormone therapy using bioidentical transdermal estrogen and oral progesterone