The following groups of people are at a greater risk of developing a vitamin B12 deficiency: Vegans or vegetarians People 75+ years Having a digestive system disorder like Crohns or celiac disease Drinking excessive amounts of alcohol Having Sjgrens syndrome Taking certain medications like oral birth control or metformin Common symptoms of a vitamin deficiency include fatigue, numbness, poor balance, memory loss, and breathlessness
Phytomedicine 1(91) Qiu R, Sun W, Su Y, Sun Z, Fan K, Liang Y et al (2024) Irisins emerging role in Parkinsons disease research: a review from molecular mechanisms to therapeutic prospects
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Cardiovascular Diabetology 20:129
American Physiological Society