b12 injection leg cramps deficiency: Symptoms may include nocturnal cramping What vitamin deficiency causes leg

If appetite or energy falls, repletion often reverses those symptoms

For example, higher vitamin B12 intakes or serum concentrations were not associated with an increased risk of pancreatic cancer [65], breast cancer [66], or esophageal cancer or gastric cancer [67]

van Bunderen CC, Oosterwerff MM, van Schoor NM et al (2013) Serum IGF1, metabolic syndrome, and incident cardiovascular disease in older people: a population-based study

Individual components are recognized nutrients, but that is not the same thing as an approved indication

Health Conditions Associated With MTHFR Mutations MTHFR mutations may cause B complex and other nutritional deficiencies

In a Swiss study (11), almost half of all general practitioners agreed with prescribing B12 for unexplained fatigue, even though theres not much research to bear it out