system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Is there truly such a thing as a "fat gene"? If so, does that mean people can become obese if they eat a normal amount of calories?
gpt
There are some indications that some genetics, and/or medical conditions, may contribute to some amount of increased weight gain. However, the amount is often dramatically overstated, and minor relative to diet.