I lost 15kg in 3 months by cutting down carbs and cutting down portion sizes by about 50%. Essentially cut out rice, pasta, bread and swapped with wraps (low carb) or zucchini noodles. Also used low carb wraps as a pizza base. I opted for high protein instead. I felt super hungry when I cut down portion sizes but as my stomach shank to a normal size, I started to eat less and felt full when I was supposed to. I also felt sick if I would then overeat. This is the hard part for most people. They believe they need to eat something when they get hungry when they don't. Your stretch receptors in your stomach need to recalibrate. I also went to the gym and did 30 min of cardio and 20 minutes of strength training 3-4 times per week.