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A primary care physician will typically run blood tests to confirm a deficiency before writing a prescription that youd fill at a pharmacy
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But there are also some other signs unrelated to hair that may indicate a B12 shortfall: Fatigue, weakness and lack of energy Lightheadedness Pale skin Shortness of breath Heart palpitations Loss of appetite Numbness and tingling Cognitive changes like memory loss Depression Along with hair shedding, some other specific hair-related symptoms can signal low vitamin B12 levels: Thinning hair on the scalp or other body parts Dry, brittle hair prone to breaking Unusual hair texture - straight hair becoming curly or vice versa Faster graying of hair Changes to the hairline, like a widening part However, many factors beyond nutrient deficiency can also cause hair loss and premature graying
Administering an Intramuscular Injection Wash your hands and clean the injection area with Push back or remove any clothes that cover the injection site so the bare skin is exposed and accessible
B12 also helps your body metabolise fat and carbohydrates for energy