No study compared cycle durations
Numbness in the foot or weakness when walking are also common
Interestingly, much of the research has been based on doses far exceeding the recommended daily intake, both in individuals with pathological conditions and in healthy subjects
Overall health: Sleep quality, nutrition, stress levels, and age all affect healing capacity
Others who might be prescribed B12 shots are those at the highest risk for a B12 deficiency, including: Vegans, since vitamin B12 is found only in animal products People ages 60 and up since their bodies don't absorb B12 as efficiently People with Crohn's disease or pancreatic disease, since they prevent nutrient absorption People who had weight-loss surgery, which decreases B12 absorption People with an eating disorder People with HIV People with diabetes Since a mild B12 deficiency might not cause symptoms, it can go undetected for years since levels are not checked during routine blood work