Exposure to sunlight boosts vitamin D levels as the skin synthesizes this vital nutrient when UV rays hit it. Vitamin D plays a crucial role in calcium absorption, bone health, and immune function. Insufficient sunlight exposure can lead to deficiencies, resulting in symptoms like fatigue, bone pain, and increased risk of illnesses. Guidelines recommend getting around 10 to 30 minutes of sunlight several times per week, depending on skin type, location, and time of year. However, it's important to consider skin protection to prevent adverse effects like premature aging and skin cancer.