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Temporary numbness from sitting in one position too long resolves in minutes
It also plays an important role in weight loss, and overall nutrition and wellness
Risk factors that should prompt consideration of B12 deficiency include advancing age (reduced stomach acid production), strict vegan or vegetarian diets, pernicious anaemia, gastrointestinal surgery (particularly gastric bypass or ileal resection), long-term use of certain medications (metformin, proton pump inhibitors, H2-receptor antagonists), nitrous oxide exposure (including recreational use), and conditions affecting the gut such as Crohn's disease or coeliac disease
Vitamin B12 can be injected into several locations on the body, including the upper arm, thigh, or buttocks