Vitamin B12, also known as cobalamin, is an essential nutrient that plays a crucial role in the body's overall health. It helps produce red blood cells, supports nerve function, and is vital for DNA synthesis. This vitamin is primarily found in animal products like meat, fish, eggs, and dairy, making it important for those who consume these foods. For individuals following a vegan or vegetarian diet, getting enough vitamin B12 can be challenging. They may need to consider fortified foods or supplements to ensure they meet their daily requirements. A deficiency in vitamin B12 can lead to fatigue, weakness, and neurological issues, highlighting its importance in a balanced diet.