I understand that flour 1355 contains additives, and food additives such as whitening agents and preservatives may be added in the production process. These additives meet the national standards and are harmless to human body during normal use. When purchasing, you can check the ingredients list and production standards to ensure that the flour meets the national standards. GB/T 1355 is the national standard of wheat flour, which stipulates the basic technical requirements and inspection methods. It belongs to medium gluten flour, with protein content of 9%- 1 1%, which is affordable and often used.