B12 deficiency

Vitamin B-12 deficiency can cause numbness, tingling, unstable walking, weakness, decreased vibration sense, and eventually falls and brain disease if left unchecked. It can be caused by decreased intake (i.e. vegan diets), pregnancy, hyperthyroidism, poor gastrointestinal absorption (i.e. gastric bypass) and certain medications, such as neomycin, metformin, PPIs (omeprazole, Prilosec, Nexium, etc.) and nitroglycerin. If your B12 levels are low, you may consider vitamin B-12 injections daily for 1 week, then weekly for 1 month. Once replete, you can either increase healthy dietary sources (8 oz of yogurt is 18% of daily value, 3 oz of salmon is 80% of daily value, 3 oz clams is 1,402 % of daily value) or take an oral supplement of 1000-2000 mcg daily or have monthly injections.