I look like my great grandmother. She was not what you'd call slender. Neither was her father. The family home was a station on the underground railroad. Her father risked his life to help slaves become free. Great grandmother carried food to the slaves, and helped her father. People figured that a little girl was less likely to be suspected.
She went on to become the first college graduate in my father's family. If I have to look like an ugly relative, I'm glad it was her.
The diet industry doesn't want you to get thin. They want you to diet. They want you to obsess over food, and spend a small fortune on diet cookies, and health club memberships. They want you to binge eat. Some diet gurus even reccomend it. Get a new doctor. Dump the diet industry.