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This increase in blood volume can cause swelling

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Patients with Leber's Disease: Vitamin B12 levels may exacerbate optic nerve atrophy

[23] Other symptoms of Vitamin B12 deficiency: As mentioned earlier, vitamin B12 deficiency can cause a wide range of symptoms, including but not limited to: a sore/red tongue [25] blurry vision loss of memory depression folate deficiency, which is often related to vitamin B12 deficiency

Vitamin B12, or cobalamin, is a water-soluble vitamin
