You can check it out yourself 
If someone is seriously overweight, it means there are issues with their metabolism and endocrine system. That’s exactly where you need to start — you have to get your hormones in balance and get all your internal processes working again.
First of all, it’s important to understand where the problem started. If I were in that person’s shoes, I’d get some tests done: glucose, insulin, cortisol, thyroid. Without a properly functioning hormonal system, losing weight is simply impossible.
Once you have the results, go straight to a dietitian to come up with a clear plan. After that, you need to get a grip on yourself and work on everything - both your mental state and your physical health.
And don’t forget: bodies are built in the kitchen, so keeping your diet under control is a must.
It’s also important to address the psychological reasons behind overeating, because nothing happens without a reason.
Check out these thread and fields as well
