Fortification of vegetable oils
Fat soluble micronutrients can be added to oil, i.e. vitamins A, D, E, and K. WFP recommends to add 30,000 IU vitamin A/kg and 3,000 IU vitamin D/kg.
Adding the fortificant in the vegetable oil
Mixing liquids with liquids is relatively easy, a container (e.g. a big tank) can be used to put oil (e.g. by pump) and to mix the correct quantity of vitamin mix in it by rotary stainless mixer or the tank can be equiped with a screw or blade adapted to liquid mixing.