Which vitamin is primarily found in animal products and is important for nerve function?

Vitamin B12 is primarily found in animal products and plays a crucial role in nerve function. This vitamin is essential for the formation of myelin, the protective sheath that surrounds nerves, which is necessary for efficient nerve transmission. Additionally, B12 is involved in the synthesis of neurotransmitters, the chemical messengers that facilitate communication within the nervous system. A deficiency in this vitamin can lead to neurological symptoms, including numbness, balance issues, and cognitive disturbances.

Other vitamins mentioned do not serve the same role in nerve function nor are they predominantly sourced from animal products. For instance, vitamin A is important for vision and immune function, but is not primarily linked to nerve health. Vitamin C plays a vital role in immune function and collagen synthesis but does not have a direct connection to nerve function. Vitamin D is essential for calcium metabolism and bone health, and although it has some influence on nerve health, it is not specifically tied to nerve function in the same way B12 is.