Prison food is the term for meals served to prisoners while incarcerated in correctional institutions. While some prisons prepare their own food, many use staff from on-site catering companies. Some prisons support the dietary requirements of specific religions, as well as vegetarianism. Prisoners will typically receive a series of standard meals per day from the prison, but in many prisons they can supplement their diets by purchasing additional foods, including snacks and desserts, at the prison commissary with money earned from working in the prison or sent by family and friends.