A new study has shown that there are more changes before and after weight loss surgery than one's physical appearance.

Webmd reports after weight loss surgery, many patients reported changes in appetite, taste and smell.

The study reportedly included 103 British patients who underwent Roux-en-Y gastric bypass surgery, in which the stomach is made smaller and the small intestines are shortened.

Of the patients, 97 percent had said that their appetite changed after the surgery while 42 percent said their sense of smell changed, despite having none of these symptoms before the procedure.

Researchers found that taste changes occurred in 73 percent of the patients, especially when it came to sweet and sour tastes.

Patients also noted changes in the taste of chicken, beef, pork, roast meat, lamb, sausages, fish, fast food, chocolate, greasy food, pasta and rice.

Almost three-quarters of the patients said they began to dislike certain foods, primarily meat products.

About 12 percent started avoiding starches such as rice, pasta, bread and pastry as well as dairy products including cream, cheese, ice cream and eggs.

Naturally this would cause patients to drop even more weight than before.

NewsOnWellness reported that the sudden change of taste buds reduced total food consumption, affecting the body mass index of patients as well.

According to the study recently published online in Obesity Surgery, researchers of the study found that these patients lost an average of nearly 18 pounds more than those whose taste wasn't affected.

A small 4 percent began to dislike vegetables, 3 percent avoided fruit and 1 percent stayed away from canned fish.

Lead author of the study Lisa Graham stated that the drastic change in taste after the weight loss surgery may be caused by a combination of gut hormone and central nervous system effects.