Anorexia, undernutrition, weight loss, sarcopenia, and cachexia of aging

During the period between 2000 and 2030, the number of persons older than 65?years is projected to grow from 550 to 937 million worldwide. Globally, this growth represents an increase from 6.9 to 12?%. Studies have found that 74.6?% of women and 67.4?% of men aged 65?years or older suffer from many clinical and subclinical syndromes and problems, including anorexia, undernutrition, weight loss, sarcopenia, and cachexia, which are often overlooked or managed inadequately. These issues are very common in the elder. The key clinical question is whether these changes in the elder are distinct entities or an interdependent continuum. In this article, we reviewed these issues of related basic, clinical knowledge. The purpose of this review is to enhance the recognition of anorexia, undernutrition, weight loss, sarcopenia, and cachexia.