Next you're going to expect them to use gases that are sourced for human consumption. But this is a gray market. Nitrous isn't meant to be used this way; so a

Next you're going to expect them to use gases that are sourced for human consumption. But this is a gray market. Nitrous isn't meant to be used this way; so a gas supplier won't want to sell the healthier alternative for fear of getting caught knowingly selling it as a drug.