Normal levei is 200-900 picogram/ml. Less than 200pg/ml is considered deficient. Deficiency occurs due to strict vegetarian diet,
source- mostly obtained from animal food sources. 1. Take meat/egg/ fish, poultry, diary product like milk & milk product,
2. Vegetarian sources of b12 are milk, butter milk, yogurt. Vegetarians have to take b12 supplement
3. You may have to take injection b12 after consulting doctor, if no relief.
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