Vitamin B12 is one of the most important nutrients for brain and nerve health. Every cell in your nervous system needs it to work properly. When B12 levels drop, even if blood tests say “normal”, you can develop fatigue, brain fog, mood changes, memory issues, or serious nerve problems. Deficiency is common, especially in older adults, and catching it early can prevent or reverse many issues.

Heart disease remains the #1 cause of death worldwide and in the U.S. Millions die each year from heart attacks, strokes, and heart failure. Trillions are spent on medications, stents, bypass surgery, and other treatments. Yet many of these approaches focus on symptoms rather than root causes. Low vitamin B12 is an often-overlooked factor that raises heart risk through simple, measurable pathways.

Vitamin B12 is needed by every cell in your body. It helps make red blood cells, keeps nerves healthy, supports DNA production, and powers energy inside cells. When B12 runs low, symptoms can show up almost anywhere—tiredness, brain fog, numbness, mood changes, or worse. Deficiency is common, often missed, and can cause serious problems if ignored.

Vitamin B12, also called cobalamin, is a vital nutrient your body needs for red blood cells, nerves, DNA, and energy. It is unique because it contains cobalt (hence “cobalamin”) and is the largest, most complex vitamin. Without enough B12, cells cannot function properly, leading to fatigue, brain fog, nerve issues, anemia, and long-term health problems.