Different countries have different definitions of food additives. According to the regulations of the Global Health Organization, food additives should be consciously lower than the food itself, mainly used to improve the appearance of food, convenient to better preserve the taste and prolong the shelf life.According to this definition, fortifiers used to enhance food nutrition are not food additives. According to relevant Chinese laws, food additives are mainly used to improve color, aroma and preservative, and the main raw materials must be pure natural or healthy artificial synthesis, exceeding this standard is unqualified.