If the elderly appear more and more thin situation there are several factors: 1, gastrointestinal digestion and absorption function is not good, with the age of the gastrointestinal tract and digestion and absorption function will significantly decline, there will be incomplete absorption of nutrients, will lead to the elderly more and more thin. 2, if the elderly infected with diseases such as tumors, tuberculosis or other immune disorders type of disease, will also appear more and more body 3.The elderly will lose more and more weight if they have endocrine and metabolic diseases, such as hyperthyroidism, thyroid dysfunction, adrenal cortical dysfunction. 4.The elderly will lose more and more weight if they have diabetes, and the elderly are susceptible to cardiovascular and cerebrovascular diseases, and will lose more and more weight if they have severe The elderly are susceptible to cardiovascular diseases, in serious cardiovascular blood supply deficiencies will also appear increasingly thin body shape.