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Difficulty concentrating and mental impairment Another side effect of the impact a vitamin B12 deficiency can have on your nervous system: people with low or deficient B12 levels may feel foggy-headed and have difficulty concentrating and completing tasks
Over weeks two through four, your bone marrow produces new, healthy, normal-sized cells, which can improve endurance, restore a healthier skin tone, and reduce symptoms like heart palpitations tied to anemia
Combined with the ambient temperature in your home or office, and sunlight streaming into your windows, those microorganisms could start to multiply pretty quickly, Schwab says
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