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You may also experience disturbed vision, pins and needles, muscle weakness, and changes in movement
Struggle with low energy levels or fatigue
A study in the Journal of Clinical Biochemistry says, Vitamin B12 deficiency can cause big problems with nerves and blood. Vitamin B12 is key for making DNA, fatty acids, and energy. Source: Journal of Clinical Biochemistry Common Signs of Deficiency A Vitamin B12 shortage can show in many ways, like: Fatigue and weakness Numbness or tingling in hands and feet Difficulty walking Mood changes, such as depression Spotting these signs early is key for quick action
The two functional tests are: Firstly, methylmalonic acid (MMA)
This means healthcare providers can help patients with vitamin B12 deficiency get better by using proven methods (PMC11128391)
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