To extract shea butter from the nut and keep it in an unrefined state, you can use a hand method or expeller method. Both methods will keep all the vitamins, minerals and other properties of the shea butter intact.
Refined shea butter is processed by using chemicals. The chemical hexane is often used to dissolve the shea nut in order to get at the shea butter. During the refining process, shea butter loses many of its vitamins and minerals.
Also note that the unrefined should have a much darker color. Processed shea butter looses its natural smell and it’s color. This is one butter you need to have unrefined. The unprocessed product and nutrients are worth it alone to pay extra for a unrefined. You will save in health care bills or a visit to a dermatologist.