That's hard to believe!
Please note, I said no "special" diet. It is just a question of eating less. The formula for weight loss is very, very simple, take in more calories than you expend, equals gain, take in less than you expend, equals loss.
My intake to date has stabilized at 1200 calories per day intake. As health has improved, I have taken up hill walking (very lucky, we have access to 275,000 acres of mountainous desert wilderness area just a few hundred yards from home) and weight train one day a week for each muscle group. And BTW, I am 67 years old.