Is it possible for someone young (mid to high 20s) to be obese, like 3-400 pounds or more, and not have clogged arteries? Can such a person lose the weight, getting down into the mid to high 100s within a couple years, without existing heart disease after echos, x rays, stress tests etc, and live a long and healthy life (70s, 80s or higher) if it was maintained and even further improved? And continued to exercise, take vitamins, eat healthy, take care of themselves etc? Or does being obese even after losing the weigt and fat, have damage that cant be reversed, given that PCP and Cardiologists already ruled out heart disease, arrythmia, etc