Selenium toxicity can occur if doses larger than 200 micrograms per day are taken regularly. Symptoms of selenium toxicicy include fragile or darkened fingernails, a metallic taste in the mouth, a metallic or garlicky smell to the breath, nausea, and dizziness. It is extremely unlikely that selenium could completely reverse the harmful effects of tobacco smoke. This vitamin helps detoxify the cyanide found in tobacco smoke. Smokers excrete more B-12 and thus have lower serum levels.
Tobacco amblyopia can produce dimming of vision in the central part of one's visual field.
In some cases complete vision loss can occur. This information is not intended to be a substitute for professional medical advice. You should not use this information to diagnose or treat a health problem or disease without consulting with a qualified healthcare provider. Please consult your healthcare provider with any questions or concerns you may have regarding your condition.