Chromium is considered to be an essential element for humans. Those without it in their diets, such as hospital patients on artificial feeds, develop a diabetes-like condition, with high blood sugar (glucose) levels. The availability of chromium to the body may depend on the form in which it is present in food. For example, it is found in a form in association with other compounds in Brewer's Yeast and known as 'Glucose Tolerance Factor (GTF)'. Elderly people may be an at-risk group from chromium deficiency. Relatively few foods have been analysed for chromium.