6. Any person who renders any food injurious to health by means of any of the following operations, namely—
(a)adding any article or substance to the food;
(b)using any article or substance as an ingredient in the preparation of the food;
(c)abstracting any constituent from the food; and
(d)subjecting the food to any other process or treatment,
with intent that it shall be sold for human consumption, shall be guilty of an offence.