This was a gift. The International Agency for Research on Cancer (IARC) of the World Health Organization (WHO) has announced that "processed meats" such as ham and sausages increase the risk of colon cancer. It is also known that salted fish roe, such as cod roe and pollock roe, increases the incidence of stomach cancer. It is thought that additives contained in these foods cause cancer. To prevent cancer, it is important not to eat dangerous additives. This book explains carcinogenic additives used in familiar foods. Furthermore, it introduces foods that can be eaten with peace of mind, without using dangerous additives. Acquire knowledge of additives and use it as an aid to protect yourself from cancer.