The Rock Cycle Song. SEDIMENTARY rock. Has been formed in layers. Often found near water sources. With fossils from decayers. Then there's IGNEOUS rock. Here since Earth was born. Molten Lava, cooled and hardened.
Egg yolk, Swiss cheese, sardines and beef liver also naturally contain some vitamin D. All milk sold in the United States is fortified with vitamin D, according to the University of Maryland Medical Center. Yogurt, margarine, breakfast cereals and other foods may also be fortified with the vitamin.ll milk sold in the United States is fortified with vitamin D, according to the University of Maryland Medical Center. Yogurt, margarine, breakfast cereals and other foods may also be fortified with the vitamin.
Vitamin D is the name given to a group of fat-soluble prohormones (substances that usually have little hormonal activity by themselves but that the body can turn into hormones). Vitamin D helps the body use calcium and phosphorus to make strong bones and teeth. Skin exposed to sunshine can make vitamin D, and vitamin D can also be obtained from certain foods. Vitamin D deficiency can cause a weakening of the bones that is called rickets in children and osteomalacia in adults. Two major forms of vitamin D that are important to humans are vitamin D2, or ergocalciferol, and vitamin D3, or cholecalciferol.