The prevalence of obesity is rapidly increasing worldwide. One third of world population is suffering from the deleterious effects of excessive fat and adipose tissue in their body. At the same time, the average life expectancy is becoming higher and higher every decade. Therefore, living healthy and longer is the dream for everyone. Simply being obese is not the primary cause for the consequence of obesity; rather, the depot where the fat is accumulated, is the primary key for the deleterious effects of obesity. Results from historical research suggest that visceral fat increases the risk for cardiovascular and metabolic diseases, such as diabetes, myocardial infarction and ischemic stroke, not subcutaneous fat. Therefore, body mass index (BMI), which reflects body weight relative to height might not reflect the appropriate size of metabolic burden of fat in our body. In contrast, waist circumference, which reflects abdominal obesity, would mirror the metabolic burden of fat better than BMI. Visceral fat is the marker of ectopic fat accumulation. Non-alcoholic fatty liver disease (NAFLD) is another simple marker of ectopic fat accumulation and insulin resistance. Recent studies suggest NAFLD as the cardiovascular risk factor, since the presence of NAFLD increases the risk for metabolic disease, such as diabetes, and cardiovascular disease. In addition, NAFLD is accompanied by metabolic risk factors for cardiovascular diseases, such as systemic inflammation, visceral obesity and arterial stiffness. In this lecture, I will introduce my researches mainly involved in uncovering the clues to the link between metabolic health and cardiovascular disease.