Nitrous oxide is a colorless and odorless substance that’s also known as “laughing gas.” When inhaled, the gas slows down the body’s reaction time. This results in a calm, euphoric feeling. Nitrous ...

Nitric oxide is a gas that's found outside and inside your body. In the environment, nitric oxide can be toxic at high levels. But at the low levels inside your body it acts as a chemical messenger, ...