The National Institutes of Health Office of Dietary Supplements notes that vitamin B12 is a nutrient that helps keep the bodys nerve and blood cells healthy and helps make DNA, the genetic material in all cells. When levels are low, you might notice: Fatigue that sleep doesnt fully fix Slower recovery from training Trouble focusing or remembering details Numbness, tingling, or pins and needles Pale skin, shortness of breath, or lightheadedness If you have risk factors, vegan/vegetarian diet, heavy training, frequent alcohol use, long-term acid-reducing meds, GI issues, or simply getting older, then getting B12 delivery right matters for day-to-day performance and long-term health
Its primary source is found in food products of animal origin, including meat, milk, eggs, and more
That can mean fewer doses to reach the same effect
You do not have to remember anything each day
a lower overall metabolic rate
Optic nerve atrophy can worsen in patients whose methylcobalamin levels are already elevated
