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6 Low NAD+ levels are linked to fatigue, insulin resistance, frailty, and neurodegenerative disorders like Alzheimers

As a result, many patients report feeling more energized after getting a B12 shot

Journal of Blood Medicine

Oral supplements have to pass through the digestive system and may not be absorbed efficiently, especially in people with gastrointestinal conditions like celiac, Crohns, or gastritis

If your body is not operating at its full potential due to low levels of this vitamin, B12 shots are an effective, high-impact way to get a direct dose of cobalamin (active B12) into your system, straight into the muscle