Still, side effects from B12 supplements are possible, especially at higher doses, and include: Headache Nausea Vomiting Fatigue Weakness Diarrhea Tingling in the hands and feet Nasal spray Vitamin B12 is also available in a nasal spray
These nerve-related changes can occur even without anemia being present, which means standard blood counts alone may not catch a developing deficiency
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Taking too much vitamin B may also cause other minor side effects When consumed in food in which vitamin B12 either naturally occurs or in which vitamin B12 has been fortified under the guidance and purview of the U.S
Many people do both, but it is worth a quick chat with your provider first
Compounds that can shift cellular energetics, improve metabolic flexibility, and potentially slow the clock on age-related decline