The advice to breathe “in through the nose, out through the mouth” appears to be based on superstition rather than science. Nose breathing is preferable. Breathing is automatic. We breathe in oxygen and breathe out carbon dioxide without having to think about it. But many people tell us we should think about… read more "In Through the Nose, Out Through the Mouth"
Navage is a machine that uses salt water to rinse out the sinuses, allegedly alleviating the causes of congestion, allergies, colds, and more. The evidence for their claims is lacking. Navage airs its TV commercials with annoying frequency. They say: Pandemics remind us that germs invade through your nose, the… read more "Navage Promises Benefits from Cleaning Your Nose with Their Expensive Machine"