Function?

Vitamin B12 is essential for the formation of red blood cells, maintaining healthy nerve cells, supporting nerve function, synthesis of myelin, a protective covering around nerves, DNA synthesis, cell division, and the production of genetic material in cells. It also aids in the metabolism of carbohydrates, fats, and proteins, supporting energy production in the body.

Whole food sources?

Small fatty fish, grass-fed organ meats, free-range poultry, grass-fed beef, pasture-raised eggs, and raw milk.