Kashrut
Among the numerous laws that form "kashrut" are prohibitions on the consumption of certain animals (such as pork and shellfish), mixtures of meat and milk, and the commandment to slaughter mammals and birds according to a process known as "shechita". There are also laws regarding agricultural produce that might impact the suitability of food for consumption.
Cannabis and religion
In the modern era, Orthodox rabbi Moshe Feinstein stated in 1973 that cannabis was not permitted under Jewish law, due to its harmful effects. However Orthodox rabbis Efraim Zalmanovich (2013) and Chaim Kanievsky (2016) stated that medical, but not recreational, cannabis is kosher.