The Center for Science in the Public Interest’s resource library is the place to find primary source material such as fact sheets, legal and regulatory filings, letters to agencies, infographics, and other documents.
Until the late 1930s, stomach cancer was the leading cause of cancer death in the United States. So much for the “good old days.”
The incidence of stomach has plummeted here since then. (But it’s still a big problem in developing countries.)
Several reasons have been proposed for why it’s fallen here. One is that the increased use of refrigeration since the 1930s has made fresh fruits and vegetables with vitamin C more available and has decreased the use of salted and smoked foods.