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While anyone can benefit from optimal B12 levels, certain groups are at higher risk for deficiency: Adults over 50 (reduced stomach acid affects absorption) Vegetarians and vegans (B12 is primarily in animal products) People with digestive conditions (Crohn's, celiac, gastritis) Those who've had gastric bypass surgery People taking metformin or acid-reducing medications Anyone experiencing unexplained fatigue or brain fog Athletes and active individuals needing enhanced recovery Those with symptoms of B12 deficiency B12 Injections vs
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10.1038/s41467-025-60719-z 92 ZhaoK
A number of clinical observations suggest that Down patients may have a functional folate deficiency despite having normal plasma levels of folate and vitamin B 12 [13]
