Vitamin B12 deficiency is common. While supplementing with injections is considered safe in most cases, here’s what you should know before you try it. Vitamin supplements are very popular. People ...

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Vitamin B12 is an essential nutrient that's often overlooked. Also known as cobalamin, vitamin B12 helps your body produce vital red blood cells and boost your energy levels, among other things.

Feeling sluggish? Gaining weight? What you need is a shot in the arm, claim advertisers for trendy vitamin B12 injections. Don’t let marketers needle you. “If medical testing confirms that an ...