It's lawful to offer canisters of nitrous oxide for meals preparing needs. However, a warning issued by Medsafe in April 2021 identified that nitrous oxide that's offered for the goal of inhalation is classified to be a prescription drugs, and so issue into the provisions of the Medicine Act 1981. https://mylessblwg.fitnell.com/74820354/what-does-n20-whipped-mean