Anonymous wrote:I have a 16 year old that eats a limited diet of burgers, fried chicken, pizza and tacos. He's ripped with a 6 pack and hasn't worked out since last summer.
Really. All the BS about genetics having zero roll in this...come on. It's like 99% genetics.
I don't agree with 99% of BMI being genetic, but I think it is probably around 50-70%. BMI is really more of a proxy for general health than a direct indicator. It doesn't tell you your body composition what type of fat you have. If you have a lot of subcutaneous fat but very little visceral fat, you can very easily be healthier than a skinny person with little fat except on their belly. Where you store your fat is genetically determined.
Another piece is how you were raised. The standard American diet is pretty terrible. If that is what you are used to because that's what you grew up with, that can be a hard habit to break.
As someone who has always been very genetically lucky with regards to weight, I will say that when I got close to being overweight, it was absolutely because I was "treating myself". Yes, eating a lot of junk will cause weight gain, and a lot of people eat a lot of junk.
Genetics impacts how you look and a lot of aspects of your health, but it is absolutely in your power to use diet and exercise to improve your cardiovascular and metabolic health. Lifestyle changes can make a huge impact. And if GLP-1s help you get there, great!