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Megadoses of B12 can lead to headaches, nausea, diarrhea, vomiting, and flushing, he says
Recovery typically requires 6 to 12 months before return to running
E., Arnet I., Walter P
It also enhances muscle endurance and reproductive performance during breeding
Physical Symptoms of Vitamin B12 Deficiency Fatigue and weakness Pale skin Shortness of breath Nerve problems Mouth ulcers Digestive issues Vision problems Mobility difficulties Cognitive Symptoms of Vitamin B12 Deficiency Peripheral Neuropathy Cognitive Disturbances Memory Problems Reversible Dementia Confusion Decreased Problem Solving Psychiatric Symptoms of Vitamin B12 Deficiency Depression Anxiety Intrusive Thoughts Irritability Psychosis Inattention Insomnia Panic attacks Treatment of Vitamin B12 Deficiency It has been observed that oral administration of high-dose vitamin B12 (1 to 2 mg daily) is as effective as intramuscular administration for correcting anemia and neurologic symptoms
Her doctors had not considered the possibility that her many symptoms could be due to a drug-induced lack of cobalamin
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