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This allows the vitamin to be absorbed directly into the bloodstream without having to go through the digestive system, reducing the risk of malabsorption in the stomach

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Elevated levels of serum homocysteine and methylmalonic acid have been shown to be highly sensitive markers for vitamin B 12 deficiency

The skin on my belly and scalp was sensitive to the touch, but that was almost all gone after 3 days

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Vitamin B12 deficiency is a well-recognized cause of neurological symptoms such as paresthesia, cognitive slowing, and abnormal sensory perceptions, even in the absence of subacute combined degeneration (SCD) of the spinal cord