system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: In developing countries, poor people tend to be thinner than rich people. But in developed countries, rich people tend to be thinner than poor people. What explains the discrepancy?

Edit:

Poor Americans/Brits, and rich Chinese/Russians, are fat. 


Rich Americans/Brits, and poor Chinese/Russians, are thin. 


Why? 


**Edit 2: In this thread - Answers to *why poor Americans are fat*. However, that does not explain how poor Chinese are *not* fat, or why rich Russians are fat.**
gpt
I don't know that there's one answer to this, but if you're poor and in a developing country, there's a much higher chance you have food insecurity and more commonly intensive manual labor. 

In developed countries, rich people can afford more time for exercise, and have better access to healthier foods, while poor, calorically dense foods, are cheap and widely available, and jobs have a higher proportion of sitting behind a desk.