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Additionally, B12 deficiency in infants can lead to lethargy, decreased appetite, and failure to thrive
[3] It helps create new red blood cells that are vital for supplying oxygen and other nutrients to your hair follicles
Intravenous Administration The way B12 injections are given, either intramuscularly or intravenously, affects how well they work
If you are wondering whether B12 is good for weight loss, the short version is that it helps some people and does very little for others, and the difference comes down to your B12 levels
High doses of B12, often used to treat deficiencies, may cause side effects such as headaches, nausea, diarrhea, fatigue or weakness, and tingling in the hands and feet