behaviour (the usual word)

administration

the sort of food usually eaten (by a person, community etc); the sort of food (to be) eaten by a person in order to lose (or gain) weight

abstinence from food

the science of, rules for, clean and healthy living

cleanliness

an order, law or custom which guides or controls behaviour or action; a habit; authority; to govern (people, a country etc)

standard, principle of behavior

(a particular way of) treating a person or thing

medical care