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Vitamin B12 is important for brain function, supporting cardiovascular health including red blood cell formation, and in supporting DNA activity.
Your body depends on vitamin B12 to help to maintain normal energy levels, promote healthy neurological activity, including mental alertness, supports normal homocysteine levels for healthy cardiac function, helps to ease occasional stress and sleeplessness, helps maintain healthy cell growth and repair, promotes normal immune function and supports normal metabolism of carbohydrates and fats.
Without adequate blood levels of B12, you can experience symptoms related to low energy, mental fatigue, mood changes, sleep difficulties, and even occasional indigestion.