Meat May Boost Risk of Stomach Cancer
Red Meat, Processed Meat Stand Out in Observational Study
Feb. 28, 2006 -- Eating a lot of meat may raise the risk of a certain type
of stomach cancer, new research shows.
Researchers studied more than half a million adults in 10 European countries
for nearly 6.5 years. Participants provided information about their diets at
the study's start.
The vast majority of people didn't develop stomach cancer during the study.
However, people who ate meaty diets -- and were infected with a certain
bacterium -- were more likely to get a particular type of stomach cancer.
Red meats and processed meats stood out, write the researchers. They
included Carlos Gonzalez, MD, PhD, of the Catalan Institute of Oncology in
The study appears in the Journal of the National Cancer
When the study started, most participants were 35-70 years old and weren't
known to have cancer. They provided blood samples and completed questionnaires
about their diets and lifestyles.
Participants estimated their daily intake of these foods:
- Red meat: pork, beef, veal, lamb
- Poultry: chicken, turkey, duck
- Processed meat: ham, bacon, sausages, processed meat cuts, hamburgers,
meatballs, and pates
The surveys also covered smoking, alcohol use, and physical activity. No one
was asked to change their diets or lifestyles; the study was purely
observational. That is, the researchers observed who got stomach cancer and who
didn't as the years passed.
During the study, 330 participants developed stomach cancer. That's a
"relatively low" number for such a big group, write the
Stressing the need for further study, the researchers note that people who
ate more meat -- especially red meat and processed meats -- were more likely to
get a particular type of stomach cancer called gastric noncardia cancer.
"Gastric" means stomach. "Noncardia" refers to the cancer's
location within the stomach. The cardia is the part of the stomach nearest to
That pattern was mainly seen in people infected with the intestinal bacteria
Helicobacter pylori (H. pylori). H. pylori may cause
gastritis, which is the inflammation, irritation, or erosion of the stomach's
lining. Without treatment, chronic gastritis can lead to ulcers and stomach
However, H. pylori is common and doesn't always lead to ulcers or
Other findings included:
- Meat consumption varied widely between countries.
- People who ate the most red meat were more likely to have ever smoked than
those who ate the least red meat. Smokers have increased risk for stomach
- People who ate the most processed meat ate fewer fruits and vegetables than
those who ate the least amount of processed meat.
The study doesn't prove that meat caused any cases of stomach cancer, and it
doesn't include dietary recommendations.