What are good sources of vitamin D for teens?

Your body naturally produces enough vitamin D daily from 20 minutes of bright sun exposure (without sunscreen), but for those times of year when you're not able to do this, take 2,500 to 5,000 International Units (IU) of vitamin D (don't worry, it's only about 1 or 2 capsules) to make sure your immune system stays strong. Taking cod liver oil (2 teaspoons shaken with a shot of orange juice every morning) is a great way to get vitamin D, since it is a fat soluble vitamin and needs fat to be absorbed. Otherwise, your body will just excrete it in your urine.

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