This runners tweet (as well as the emails and messages I receive via my website and Facebook page from as far away as Nepal, India and Lebanon to as close to as Canada and the United States from runners who have reached out to me after reading my B12 deficiency story to share their similar symptoms) compels me to educate fellow runners and athletes about B12 deficiencythe symptoms, causes, treatments and the serious consequences of untreated B12 deficiency
Bang P, Brismar K, Rosenfeld RG, Hall K
Increased absolute concentrations of intracellular NAD + links with activation of NAD + -dependent histone deacetylases (e.g., sirtuins) that also mediate epigenetic regulation of gene expression[40] and adipocyte physiology.[45] Similarly, increased intracellular concentrations of SAM, a universal substrate for SAM-dependent histone methyltransferases, could have profound influence on cellular epigenetic modifications, including transcriptional regulation and the expression of genes that regulate adipogenesis and/or thermogenesis promoting browning of adipocytes (e.g., PPAR, PRDM16, UCP1, Wnt).[4648] NNMT protein expression is relatively lower in the murine brown adipose tissue (BAT) compared to the WAT [37] and nnmt (a WAT-selective gene [49, 50]) gene expression has been reported to be lower in the BAT of HFD fed mice compared to normal chow-fed mice.[49] Furthermore, NNMT activity is significantly higher in the white fat compared to brown adipose tissue and the other organs (e.g., liver, lungs) in DIO mice.[16] Hence, treatment with an NNMT inhibitor in DIO mice may less likely impact BAT or other tissue NNMT activity, but could be speculated to modulate thermogenic/adipogenic genes in the WAT
B12 is also a very common nutrient deficiency for those losing weight
