Vitamin B12 is crucial for energy, brain function, red blood cell production, and nerve health.Vitamin B12 is essential for your body to function properly, and deficiency can lead to serious health problems if left untreated. The good news? It’s easy to prevent and fix with a balanced diet or the right supplements. Vitamin B12 is crucial for energy, brain function, red blood cell production, and nerve health.Vitamin B12 is essential for your body to function properly, and deficiency can lead to serious health problems if left untreated. The good news? It’s easy to prevent and fix with a balanced diet or the right supplements. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle