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Common signs include: Fatigue and weakness Neurological changes, such as numbness or tingling in the hands and feet Megaloblastic anemia, characterized by large, abnormal red blood cells Cognitive difficulties, including memory loss and confusion Early detection and treatment of B12 deficiency can make a big difference

Drug development was formally discontinued

The study found that, among men with infertility, low vitamin B12 was linked to a higher risk of testosterone deficiency and impaired androgenic hormonal profiles that impact sperm production, and hence fertility

First dose felt some nausea and fatigue, but that was over within the first week

Potassium and magnesium may need attention too