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B12 supplementation has been shown to lift mood in patients with depression who are deficient in the vitamin. Eye health B12 deficiency can also affect eye health, specifically the optic nerve.

A doctor recently took to his YouTube channel to shed light on some signs of the disease ... B12 deficiency may cause jaundice or yellowing of the skin, or yellowing of the whites of the eyes.

"Dry eye is a complex disease and is affected by not only ... vegans require B12 supplements — symptoms and signs of B12 deficiency include anemia, yellow skin, optic neuropathy, cognitive ...