ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Vitamin D3. Computer graphic of the vitamin D3 molecule. Yellow spheres represent carbon atoms and blue spheres represent hydrogen. Solid lines represent bonds. Vitamin D3 is one of the D-group vitamins. It is present in oily fish (such as sardines, herring and tuna), liver and egg yolk, and is made in the skin after exposure to sunlight. It plays several important roles in the body, helping to regulate calcium and phosphate balance, and is essential for strong bones and teeth. Deficiency leads to rickets in children and osteomalacia in the elderly. Excessive consumption can lead to vitamin poisoning, kidney damage, lethargy and loss of appetite.
Model release not required. Property release not required.