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This is because the risk of toxicity and serious adverse effects from an overdose is rare

Low B12 levels may lead to tiredness, weakness, cognitive difficulty, or numbness and tingling in the extremities

Mild cases often feel quicker improvement later

Key functions of vitamin B12 include: Supporting red blood cell production Enabling DNA synthesis and cell repair Protecting nerve health and the myelin sheath Supporting energy metabolism and mental clarity In simple words: Vitamin B12 helps your body turn food into usable energy and keeps your brain and nerves firing properly

Suitable for puppies, toy breeds, and small dog breeds of all life stages

Studies show that older adults might need more B12 or it more often