[mminer237]

Fiber is essentially mass with little to no nutrition in it. So it makes you feel fuller without adding calories, like GLP-1 drugs.

I do think there's a strong argument that lack of fiber and protein are huge contributors to the world's obesity problems.

[alvah]

"So it makes you feel fuller without adding calories, like GLP-1 drugs"

Nobody really knows how GLP-1 agonists work, but given the other effects (e.g. insulin stability, change in other addictive behaviours etc.) it's definitely not just this.

[array_key_first]

In most developed countries people eat lots of fiber. Like just unbelievable amounts of meat, more than ever before in human history and prehistory.

[warkdarrior]

What are you talking about?? Meat contains no fiber. The primary fiber source is plant-based foods (e.g., vegetables). So modern populations eating lots of meat means they're getting little to no fiber.

[array_key_first]

Sorry, that was a mistype, I mean lots of meat, very little fiber.