On: Ask HN: Any weird tips for weight loss?

[draven]

You should have a look at the Buteyko method. The basic premise is most of us suffer from chronic hyperventilation, which comes with a lot of issues including obesity, and the method aims at training us to better tolerate higher CO2 levels.

Training for max breath holds would also help you tolerate higher CO2 levels and breath less.

[copperx → draven]

Having less oxygen would help reduce oxidation, I would think

However, there are cognitive effects from having too much CO2.