Vitamin A is a fat-soluble vitamin essential for vision, immune function, and skin health. It can be found in foods like carrots, sweet potatoes, and spinach, and is crucial for maintaining healthy eyesight and supporting the body's defenses against infections. Vitamin D is another fat-soluble vitamin that helps regulate calcium and phosphorus in the body, promoting healthy bones and teeth. It can be obtained through sunlight exposure, certain foods like fatty fish and fortified dairy products, and supplements. Adequate levels of Vitamin D are important for overall health and well-being.