Vitamin D deficiency is increasingly common due to limited sun exposure from modern lifestyles. Sunlight and supplements are the primary sources of this essential vitamin. While sunlight naturally produces vitamin D, its effectiveness varies by location and skin type. Supplements offer a consistent alternative but must be dosed carefully to avoid toxicity. Individual needs determine the best source. Vitamin D deficiency is increasingly common due to limited sun exposure from modern lifestyles. Sunlight and supplements are the primary sources of this essential vitamin. While sunlight naturally produces vitamin D, its effectiveness varies by location and skin type. Supplements offer a consistent alternative but must be dosed carefully to avoid toxicity. Individual needs determine the best source. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle