Hello, ajjab, From your history , I understand that three of your cousins have been diagnosed to have Fatty Liver . You also need to find out if they are overweight ,diabetic ,and have high lipid levels like high cholesterol and triglycerides. If they meet this criteria , they fit Metabolic Syndrome description and this can run in families although it is not hereditary in a strict sense. If the cause of death was advanced liver disease , it had to be cirrhosis which is very advanced stage that could lead to coma and death. You need to find out about that also. As prevention , watch your weight. Excercise regularly, keep your lipids down by proper diet (Low fat and restricted carbohydrates, especially concentrated sugars) and good protein intake. You should also be on Super B-Complex Vitamin, along with Vit-E 800 i.u. daily. You can get a base line ultrasound of the liver along with all the liver function tests, complete lipid profile, check for diabetes including blood sugar and HbA1C level. Hope this gives you a starting point which you can discuss with your own doctor and act appropriately. I wish you the very best.