New research shows vitamin D has powerful tumor-preventing properties. Most people associate vitamin D with strong bones. It is certainly true that you need enough of this nutrient in order for calcium to enter your bones and strengthen them. However, in recent years scientists have discovered a plethora of other benefits of this nutrient. Vitamin D is actually a steroid hormone with a range of benefits to the immune system. Its protective effects on lung cancer were published in the journal Anticancer Research. This finding is based on evidence from observational studies, animal models and in vitro cell culture tests. These studies have shown that vitamin D plays a beneficial role in reducing inflammation in the lungs, and helps to prevent cancer developing in them. Your body produces vitamin D when your skin is exposed to the sun’s UVB rays. Cholesterol in your skin is partly converted into vitamin D. The process continues in your liver and kidneys. People with liver or kidney problems often don’t manufacture vitamin D from the sun properly, and they greatly benefit from taking a vitamin D supplement. Interestingly, vitamin D is converted to its active form in your lungs, suggesting it may play an important role in lung health. Have you had a blood test to check your vitamin D level? This is very important, especially during winter. Many people are surprised to discover their level is inadequate, even despite frequent sun exposure. Reference