(Dr. Joseph Mercola) Health care officials’ recommendations to avoid sun exposure unless you’re slathered in sunscreen have deprived humans of their fundamental need for sunlight. In the video above, Dr. Paul Saladino, author of “The Carnivore Code,” a book on nose-to-tail animal-based eating, and host of the Fundamental Health Podcast, delves into the many reasons why sunlight is so essential it could even be described as a nutrient.