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Description
Vit B12 deficiency, itself, has been reported to cause acute parkinsonism

By i.m., s.c., or i.v injection

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One example is vitamin B12, an essential nutrient that assists in proper food absorption, digestion, and metabolism, as well as assists in immune and nerve function. Vitamin B12 can only be found in animal products, such as eggs, dairy, fish, milk, and red meat
