Which is main causative factor of metabolic syndrome?

Fat & inactivity: Metabolic syndrome is usually due to obesity and lack of physical activity.

Genetics of torso wt: Insulin resistance is the cause, ie. Your muscles and liver lose sensistivity the bodies own insulin. If you carry weight on the middle and are high waisted you are prone to this, exercise also improves Insulin resistance as well as low carbohydrate diets.

Insulin resistance: Metabolic syndrome is very preventable. Excessive sugar and carbohydrate intake cause high blood sugar levels, which then make your Insulin levels rise. Over time the chronically high Insulin levels lead to Insulin resistance and you will need to make higher and higher levels of Insulin to maintain normal blood sugar levels. Eventually you will have full blown diabetes, heart disease and htn.

OverEating/Sedentary: 1 Over eating and improper eating habits like consuming more calories and too many carbohydrates both contributing to Obesity 2 Lack of exercise and sedentary life style also contributing to obesity 3 Genetics What bad genes you inherited causing high BP,Diabetes and low HDL, may also contribute with poor life style as mentioned in 1 and 2 above