Beta-Carotene is converted into Vit A in the liver, and what is not needed is excreted out. As with Vit A, it is a potent antioxidant, and has even been recently shown to aid in the prevention of cancer. The eyes have also responded well to Beta-Carotene doses. Food sources include green and yellow fruits and veggies. Fish liver oils are another good source.
Vitamin found in animal foods, it is fat soluble so stays in the system and can accumulate.
Essential for vision and skin , especially acne problems. Also useful in producing normal cells that reproduce such as bone and heart. Liver is a good source or supplementation is another choice. Helps maintain healthy skin as well. Riboflavin, Important for energy production, vision, and mental health.