Food vitamins and minerals can lead to diseases that can have far-reaching effects on health. For instance, 30% of the world's population either has, or is at risk for developing, iodine deficiency. It is estimated that at least 3 million children are blind due to vitamin A deficiency. Vitamin C deficiency results in scurvy. Calcium, Vitamin D, and phosphorus are inter-related; the consumption of each may affect the absorption of the others. Kwashiorkor and marasmus are childhood disorders caused by lack of dietary protein. Many individuals limit what foods they eat for reasons of morality, or other habit. For instance, vegetarians
House System at the California Institute of Technology the name Ricketts to the disease rickets and the fact that scurvy is another vitamin deficiency disease. Members of Ricketts Hovse were known as "Rowdies" until about 1960; alumni of that period still draw the distinction between "Rowdies" and "Skurves". Ricketts House is traditionally one of the most diverse houses on the campus. Ricketts traditions include fire related activities and the brakedrum. Prior to early 2003, the Ricketts courtyard housed a large concrete firepot, in which massive fires were often enjoyed during cool Pasadena evenings. The courtyard originally featured a large Italian marble well head (historically attributed to and named