deficiency can damage the optic nerve, resulting in blurred vision. People may think they need glasses when the problem actually lies in a vitamin B12 deficiency. Before changing glasses, it is recommended to have vitamin B12 levels checked. Appropriate supplementation can help restore normal vision if a B12 deficiency is the underlying cause of the problem.
Muscle weakness
Muscle weakness is another notable symptom of vitamin B12 deficiency. This weakness is not always resolved by exercise alone, as it has a biochemical cause. Vitamin B12 is essential for the synthesis
