Vitamin D also referred to as sunshine vitamin, is crucial for overall health. It not only supports bone strength by helping calcium absorption but also boosts immunity, improves muscle function, and boosts heart health. Vitamin D also referred to as sunshine vitamin, is crucial for overall health. It not only supports bone strength by helping calcium absorption but also boosts immunity, improves muscle function, and boosts heart health. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle