If fat levels in the human body exceed the norm, then it is likely to be due to metabolic dysfunction. Dysfunction may be genetically influenced but it can also be the result of diseases such as diabetes mellitus, kidney insufficiency etc. The main cause is usually faulty nutrition and lack of exercise. Consistent dysfunction is a risk factor for heart disease, strokes.
The disease can be treated through a change in nutrition and lifestyle. Extreme cases receive medicinal treatment.