Obesity now is a pandemic problem and depending on were are you located in this part of the globe are the approaches to combat this problem differs from one area to another. In a third world country it is more of diet , exercise and herbal supplements while in develop countries it is more on diet pills, surgery and exercise.
A new approach in weight lose in the USA is the so called “tongue patch” it is less invasive than the bariatrics surgery but the acceptance of the procedure in the medical community is not that well accepted yet.
The rationale in the “tongue patch procedure” is that you will place a specialized plastic mesh / sew a plastic mesh in the tongue so eating solid foods will be irritating/ painful for the person thus the lesser the food intake the more you will lose weight. You can only eat liquid food. The patch need to be replaced every month.