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Other Signs and Symptoms of B12 Deficiency In addition to the above, a vitamin B12 deficiency may cause the following symptoms: Muscle weakness and muscle cramps
85 A randomized controlled trial in 769 infertile men with low sperm numbers and MTHFR polymorphisms found, in those with the MTHFR 677 TT genotype, 800 mcg (1,360 mcg DFE) folic acid daily for three months improved semen parameters and sperm fragmentation
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Deficiency of vitamin B12 is a condition in which the body doesn't make enough red blood cells and does not receive enough Vitamin B12, per the National Health Service (NHS)
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