What is the meaning of weight loss?
Weight loss, in the context of medicine, health, or physical fitness is a reduction of the total body mass, due to a mean loss of fluid, body fat or adipose tissue and/or lean mass, namely bone mineral deposits, muscle, tendon, and other connective tissue.

What is a healthy diet?
The crucial part of healthy eating is a balanced diet. A balanced diet - or a good diet - means consuming from all the different good groups in the right quantities. Nutritionists say there are five main food groups - whole grains, fruit and vegetables, protein, diary, and fat & sugar.

What is considered a significant weight loss?
Clinically significant involuntary weight loss (IWL) is defined as a loss of 4.5 kg or > 5% of the usual body weight over a period of 6 - 12 months, especially when progressive. Weight loss of > 10% of normal body weight is considered to represent protein-energy malnutrition (PEM).

What can cause sudden weight loss?
Unintentional or unexplained weight loss can be caused by a number of things, including depression, certain medication and diabetes. Potential causes of unexplained weight loss include: Addison's disease. Cancer.