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In Warren MJ, Smith (eds.)
Many Americans have one of these variations and live full, healthy lives
Food Sources Fish, shellfish Liver Red meat Eggs Poultry Dairy products such as milk, cheese, and yogurt Fortified nutritional yeast Fortified breakfast cereals Enriched soy or rice milk Signs of Deficiency and Toxicity Deficiency Measuring vitamin B12 in the blood is actually not the best way to determine whether someone is deficient, as some people with a deficiency can show normal B12 blood levels
Wait at least 30-60 seconds between sprays in the same nostril to avoid oversaturation and runoff
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