A condition familiar to many was called a sign of vitamin B12 deficiency

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Vitamin B12 is the most important substance for the healthy functioning of the body. It is necessary for the production of red blood cells, DNA synthesis, as well as amino and fatty acids. Symptoms of vitamin deficiency can develop very slowly, so it is difficult to diagnose the disease in time.

One of the first, but unusual symptoms can be nervous tics in the eye and visual disturbances. According to the Express, it's all about the constant stress that can appear on the background of a lack of B12.

This happens when damage to the optic nerve occurs. As a result, the signal that goes from the eye to the brain is disrupted, and vision begins to decline.

“The condition is called optic neuropathy and is treated with vitamin B12 supplements,” experts explained. Optic neuropathy is considered a rare complication. Visual disturbances can be observed both in one eye and in both at once.

As for tics, they can appear even with a slight lack of substance. Most often, they occur on the lower eyelid.