High doses of vitamin D (fat soluble) can be really dangerous to your body because vitamin D posioning is excess calcium in the blood, slowed mental and physical growth, decreased appetite, nausea and vomiting.
Light-sensitive cells in the retina at the back of our eye allow us to see. The human eye has two types: cones and rods. Rods are extremely efficient; a tiny amount of light can trigger them. They are responsible for our night vision.
