*Since Brandt’s reports, thousands of researchers have tested the effects of carbon dioxide therapies on cardiovascular health, weight loss, and immune function. A quick search of “transdermal carbon dioxide therapy” on PubMed brings up more than 2,500 studies. Most of these studies, I’ve found, confirm what Royat researchers had discovered a hundred years earlier, and the Greeks thousands of years before them: exposing the body to carbon dioxide, whether in water or through injections or via inhalation, increases oxygen delivery to muscles, organs, brain, and more; it dilates arteries to increase blood flow, helps dissolve more fat, and is a powerful treatment for dozens of ailments. For an extensive history of carbon dioxide research and several more resources, visit www.mrjamesnestor.com/breath.