Health practitioners universally agree that too much fat is a serious health risk. Problems such as hypertension, elevated blood lipids (fats and cholesterol), diabetes mellitus, cardiovascular disease, respiratory dysfunction, gallbladder disease, and a myriad of other health problems are all related to obesity.

The ongoing epidemic of obesity in children and adults has highlighted the importance of knowing a person’s body fat for short-term and long-term health. An important part of understanding a user’s health is differentiating between what is healthy and what is not, especially when it comes to fat.

It’s common to assume that having as little fat as possible is healthy. However, being thin does not automatically reduce one’s health risk. Being thin refers to weighing less than the recommended values in age-height-weight tables. Leanness, however, refers to the muscle, bone, and fat composition of one’s body weight. Being lean intrinsically indicates greater muscle mass development than thin.