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Gastric Bypass Surgery Changes Appetite

Bariatric Surgery News & Research | Adelaide Bariatric Centre

12 May 2014 5:04 PM

Gastric Surgery and Vegetables

Undergoing Roux-en Y gastric bypass surgery is a life changing procedure, as it not only helps suppress appetite but also influences the types of food patients crave.
This finding was recently championed in a UK study, which found patients who experienced food aversions enjoyed significantly more post-operative weight loss and reduction in their BMI compared to those without such sensory changes.

Post-operative Changes to Appetite

The study conducted by researchers from Leicester Royal Infirmary sent questionnaires out to patients who had undergone the procedure at the University Hospitals of Leicester between the years 2000 and 2011. In total, 103 patients answered 33 questions relating to postoperative changes in their appetite, taste and smell.

Of the respondents, 97 per cent reported alterations to their appetite following the gastric bypass surgery. But of course, their experiences varied, with some subjects reporting that their sense of smell and taste were either unchanged, heightened or reduced. However, 73 per cent of patients noted some form of change in the way food tasted. Respondents especially noted a change in their liking for proteins including: chicken, beef, pork, roast meat, lamb, sausages, and fish; as well fatty and high carb foods such as: fast food, chocolate, and pasta.

Sensory Changes Assist Weight Loss

Further findings from the paper, published in the journal of Obesity Surgery, found that only four per cent of those surveyed experienced an aversion to fruit and vegetables. Comparatively, 73 per cent of of participants suddenly found themselves consuming less fatty foods losing an average of 8 kilograms more than their counterparts.

While researchers were not certain as to the precise cause of these sensory changes they believe it to be a combination of gut hormone and central nervous system effects. But whatever the reason, the patients who experienced food aversions were universally found to experience significantly more postoperative weight loss and reduction in BMI compared to those without such dislikes.