Boost Your Energy with Vitamin B12 Injections This Winter Everyone complains about feeling drained or low on energy. Despite the multiple cups of coffee in the morning, we end up feeling exhausted by the afternoon. Vitamin B12 can help boost your Tired, foggy, low on energy?, Your body could be missing B 12. Boost energy, Sharpen focus, Feel the difference, fast, Its not about pushing through its about supporting your body properly., McCartan's Boost Your Energy with ! Symptoms of low B12 includes: Constant fatigue Lack of energy Memory problems Pins and needles sensations Depression or mood