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Anyone who is pregnant or planning to get pregnant should also make sure they are getting enough folic acid
While some places might market it for general energy boosts or weight loss, if your B12 levels are already normal, there's little scientific proof that these injections will give you a significant energy rush or help you lose weight
Vitamin B12 is a nutrient your body needs for energy, nerve health, and blood cell production
Many people will also experience cognitive difficulties such as problems with vision, memory, thinking, or reasoning, the development of mental illnesses such as depression, or general changes in behavior
