Part of the reason nutritionist suggest eating a “rainbow” is because each of the “colors” have their own phytonutrients and specific health functions that it increases.
Orange Foods – Sweet potatoes, Oranges, Carrots, Grapefruit..basically any orange food contributes to the lungs. They are nature’s richest source of beta-carotene, a phytonutrient that strengthens and protects the lining of the respiratory tract. They work soo effectively that even aggressive flu viruses have trouble taking a hold.
Studies show that even 1/2 cup of any orange food per day will reduce your risk of illness by up to 33%.