The exposure to ultraviolet light from sunlight leads to the production of vitamin D, researchers hypothesized that variation in vitamin D levels might account for this association. Therefor they concluded that vitamin D can reduces cancer.
Beta carotene is a precursor of vitamin A is found in most orange and green vegetables such as carrots, sweet potatoes, spinach, kale and other leafy green vegetables. An amazing nutrient, it has been shown in research to protect the lungs against toxins that are linked to lung cancer.