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Description
Vision disturbances : B12 deficiency may cause vision disturbances, possibly due to damage to the optic nerve (29) Because vitamin B12 deficiency symptoms arent specific to the condition, it may go undetected or get misdiagnosed

Placebo and the new physiology of the doctor-patient relationship

Concomitant deficiencies (iron, folate), chronic illness, or drug interactions may blunt clinical response and warrant further evaluation

Marso, S