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Certain populations, including older adults and people following a vegan diet, are at a higher risk of vitamin B12 deficiencies and may benefit from taking a vitamin B12 supplement

Severe liver disease or organ dysfunction

Hematology Oncology 16 (2), 159163

Pregnant women, breastfeeding mothers, older adults, and plant-based eaters often need closer attention because their risk of deficiency is higher

According to one report, vitamin B12 combined with omega-3 fatty acids may help slow cognitive decline in patients with early-stage dementia

Contact emergency services if you experience breathing difficulty, swelling of the face or throat, or fainting