Some common signs and symptoms include: Decreased cognitive function, such as issues with memory or understanding Fatigue Lethargy Constipation Feeling faint Depression or irritability Headache Difficulty maintaining balance Sore, swollen tongue, which may be pale yellow or very red Heart palpitations Mouth ulcers Par anesthesia (pins and needles) Vision changes B-12 deficiency risk factors Both diabetes and some medications for type 2 diabetes can increase the risk of vitamin B-12 deficiency
Sometimes it can be an early clue to a hepatic, renal, hematologic, inflammatory, or malignant process
The absorption of B12 depends on a protein produced in the stomach which decreased with age, therefore even meat eaters can be deficient in this vitamin
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Some studies show that we should be adding HCL acid to meals regularly after the age of 40
References [A] Umbrella Labs product page 5-Amino-1MQ research liquid: [1] Neelakantan H, et al