Vegetarian Diet Could Reduce Risk of Colon Cancer

A recent study has found that vegetarian diet reduces risk of colon cancer.

Another research has shown that fatty soup as appetizer reduces food intake by about 20 percent.

The researches suggest that daily life factors like choosing your diet regimen or ordering an appetizer for dinner may help in managing a healthy lifestyle.

Researchers from Tata Memorial Hospital (TMH) in Mumbai, India, set out to find out whether a vegetarian diet is associated with reduced risk of CRC if started very early in life.

In this study, researchers used a prospectively created database of 8,877 Indian patients managed in a clinical nutrition service from January 1, 2000 through December 31, 2005, to inspect the relationship of life-long vegetarianism with occurrence of CRC.

During the assessment for nutrition support, a history of life-long vegetarianism (due to religious reasons) was obtained from all patients to plan a suitable diet. Twenty-seven percent of subjects (2,092 patients) from the control cohort were life-long vegetarians and 22.4 percent (178 patients) of subjects with colon cancer were vegetarians.

Patients with colorectal cancer (n=796) comprised the primary patient group for this study. Three groups of controls were generated from the same database for separate comparison with the CRC cohort. These included all patients with non-CRC cancers (control group one: n=7,273), patients with non-CRC and tobacco-related cancers (control group two: n=1,844), and patients with benign disorders (control group three: n=74). Multivariate analysis of 7,641 patients was performed by adjusting for age, gender, body mass index and economic status.

Vegetarianism was considerably connected with patients over 65 years, male gender, body mass index (BMI) of less than 20 Kg/m2 and economic deprivation. Colorectal cancer was positively associated with old age and male gender, and inversely associated with vegetarian diet, low BMI and economic deprivation. The inverse association of CRC and lifelong vegetarianism was observed with all the three control groups.

"A well-planned vegetarian diet is a healthy way to meet your nutritional needs," said Yogesh M. Shastri, M.D., of Johann Wolfgang Goethe University Hospital, Frankfurt, Germany and previously a co-author of this study at TMH, Mumbai, India. "The exact mechanism by which life long vegetarianism may reduce the risk of sporadic CRC needs further investigation. Prolonged vegetarianism starting in early life may be a viable lifestyle option for those at risk of developing the disease."

In another study, researchers at the University of Texas Medical Branch in Galveston, Texas, tried to examine whether a fatty soup consumed before a meal might decrease food intake in both lean and obese subjects and whether this possible inhibitory effect would be related to changes in gastric functions.

For the study, investigators recruited 12 lean and 12 obese healthy subjects and invited each group to the lab for two sessions (eating both fatty soup and protein soup with the same number of calories and volume). Each session consisted of a 30-minute baseline of soup consumption, a 20-minute post-soup period, an "all you can eat" pizza meal, and a 60-minute post-meal period.

Electrogastrogram (a test recording the electrical activity of the stomach, EGG) and electrocardiogram (a similar test recording electrical activity of the heart, ECG) were recorded during each session. Food intake was gauged by the caloric count of the consumed pizza. Several symptoms, including satiety, desire for food and nausea, were rated at different times of the study. In a second study, subjects were given the soup appetizer and then taken to an "all-you-can-eat" pizza buffet together in a social setting.

When compared with the protein soup, the fatty soup considerably abridged the amount of caloric intake with the following meal in both lean (962.0 vs. 1,188.5 calories) and obese (1,331.9 vs. 1,544.6 calories) subjects. A similar reduction in caloric intake was noted in lean subjects eating in the social setting (1,555 vs. 1,825 calories), except that significantly more food was consumed in social sessions compared with the lab setting.

In addition to general caloric intake, obese subjects registered a higher appetite level after the soups than the lean controls (protein: 8.75 vs. 5.92; fat: 8.08 vs. 5.17). The percentage of normal stomach electrical rhythmi was similar between the lean and obese subjects (73.9% vs. 68.9%) before fatty soup, and was reduced after the fatty soup in the lean, but not in the obese (59.7% vs. 73.9%). Also, the obese showed a higher sympathovagal balance (1.59 vs. 0.78) and sympathetic activity (0.55 vs. 0.42) compared to the lean patients, but a lower vagal (nerve in the stomach that controls the making of stomach acid) activity (0.45 vs. 0.58).

"In this study, we found that fatty soup as an appetizer reduces food intake by about 20 percent in both lean and obese subjects and may have a therapeutic potential for obesity," said Jiande Chen, Ph.D., of the University of Texas Medical Branch and senior author of the study. "Our hope is that further studies with similar outcomes may curb those myths and that people will think about what certain foods often thought to be off-limits may be able to achieve for their overall health and weight."

"Many factors come into play when managing a healthy lifestyle. While some factors may be difficult for patients to change, other simple adjustments, such as adopting a vegetarian diet early in life or ordering the appropriate soup while eating out, may result in decreased risk for obesity and colon cancer," said Alan Buchman, M.D., MSPH, AGAF, Feinberg School of Medicine of Northwestern University School of Medicine.

"The studies presented today further demonstrate how researchers are beginning to understand the links between digestive diseases and lifestyle – most notably, diet," he added.

Source-ANI
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