4 surprising facts about vitamin D most people get wrong, as per top U.S gastroenterologist

Vitamin D is crucial for bone health and immune function, but most adults only need 600 IU daily. Sunlight exposure for 20-30 minutes without sunscreen aids production, and oily fish are excellent dietary sources. Supplements and testing aren't necessary for healthy individuals without risk factors; consult a doctor for personalized advice on maintaining adequate levels through diet and lifestyle.