Overbreathing leads to excessive carbon dioxide removal, inducing a hypoxic state and reducing oxygen delivery to tissues.

“That is, they're breathing too often, even if they're breathing in a shallow manner. They're breathing too often. And they are blowing off or removing too much carbon dioxide. And if you understand that carbon dioxide is critical for the way that oxygen is delivered from the bloodstream to the tissues of the body, including the brain, well, then it will make very good sense as to why people who are breathing too much don't actually experience all the effects of elevated oxygen, but, rather, they're putting their body into what's called a hypoxic state.”