https://www.cnn.com/2019/01/25/healt...ntl/index.html
Confirming what I always believed was already accepted for years, there is a strong genetic component to whether you will be fat or thin.
While there are lifestyle components to your weight, as well, there are some people who can eat whatever they want and never get fat, while others can maintain a very sensible, low-calorie diet and still remain constantly overweight.
It turns out that there are specific genes which were found to be responsible for this.
I have witnessed this in my own family.
My mom has always been thin, as have my brother and sister. They have never had to put out any effort to remain thin, even as they got older.
My dad was always average weight to a little bit heavy, until he started a rigorous exercise program in his late 30s, which he continues to this day. But he was not a naturally thin guy.
I seemed to have inherited the genes for this from my dad. While not prone to obesity, my body doesn't thwart weight gain like my mom and two siblings do. I also can eat a lot in one sitting, something my dad also used to be able to do when he was younger.
It's my belief that, in general, a lot more of your health and personality are genetic than most people think.