Sunlight helps your body produce Vitamin D naturally. But the same amount of sunlight does not work for everyone. Factors like your skin type, age, weather, clothing, location, and pollution affect how your body makes this vitamin.
You should not assume you get enough Vitamin D just by sitting in the sun. You must get a blood test and consult a doctor if you suspect a deficiency. Medical experts say we cannot exactly measure how much Vitamin D our body absorbs directly from the sun.