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Benefits of B12 for Older Adults B12 has a number of benefits for overall health in older adults: Boosts energy and reduces fatigue Prevents memory loss and reduces the risk of dementia and Alzheimers Improves mood and reduces depression and anxiety Reduces the risk of heart and arterial disease Normalizes cholesterol levels Promotes healthy skin, hair and nails Fosters a healthy gut biome to improve digestion Supports DNA synthesis and mitochondrial function Helps prevent cancer, including cervical, prostate and colon cancers Supports red blood cell production and prevents anemia

Supports neurological function

PMID 28032115

Less common B12 shot side effects include : Chest tightness Skin rash or hives Dizziness Difficulty breathing A blue tint to the skin Call your doc ASAP if you notice any of these negative effects