Anonymous wrote:I just came across this video yesterday. The guy talks to both men and women at various body fat percentages (5% to 50%). Worth a watch
https://www.youtube.com/watch?v=5K9QhkPww44&t=1823s
Fascinating. He shows extremely low fat people but is clear how rare and often unhealthy it is. In a nationally representative sample, only 1 out of 9000 men had under 12 percent. He interviews a woman who's at a very low percentage (maybe 12, I think) and she explains that her hair is falling out, she doesn't menstruate, and she gets exhausted walking across the room. A man who's cutting for a bodybuilding competition says he's in a constant mental fog.
For normal people, just focus on your body's ability to DO stuff. I'm naturally skinny but work to put on weight - both fat and muscle - because I have more energy and get sick less.