Tag: Eyesight problems

According to the World Health Organization, vitamin A deficiency is the leading cause of preventable childhood blindness worldwide. However, a deficiency is not the only nutritional issue that can affect vision; the vitamin messes with eyesight when levels are either too low or, in some cases, excessively high.

According to the World Health Organization, vitamin A deficiency is the leading cause of preventable blindness in children worldwide. This critical nutritional gap is a primary answer to the question: which vitamin deficiency causes eyesight problems?

While vision problems are a known symptom of **vitamin B12 deficiency**, the relationship with excessive B12 intake is less understood and more complex. A recent study found a significant association between high-dose vitamin B12 intake and glaucoma, although excessive B12 is generally considered low-toxicity. This suggests a need for careful consideration when supplementing, particularly at very high doses.