The Diamond Mark of Quality (also referred to as D-Mark) is a voluntary product certification scheme operated by Kenya Bureau of Standards (KEBS). It is mark of excellence awarded.

Food fortification is the addition of one or more vitamin and/or mineral to a food (usually referred to as food vehicle) to correct or prevent a demonstrated micronutrient deficiency.

This is a mandatory product certification scheme for locally manufactured products provided for under section 10 of the Standards Act Cap 496, Laws of Kenya.