To eat less, your body may want you to eat slowly

NEW YORK (Reuters Health) - Your mother's advice to slow down at meal time may have been wise after all: a new study suggests that shoveling down your food blocks the body's natural appetite-control process.

"Most of us have heard that eating fast can lead to food overconsumption and obesity, and in fact some...studies have supported this notion," Dr. Alexander Kokkinos, the lead researcher on the study, said in a written statement.

What has been missing, however, is biological evidence that a leisurely meal is better for appetite control, according to Kokkinos and his colleagues at Athens University Medical School in Greece and the Imperial College London in the UK.

To study the question, the researchers had 17 healthy men eat a generous portion of ice cream under two different conditions: in one, they ate the treat in two servings over 5 minutes; in the other, they ate it in small servings over 30 minutes.

Although the groups' feelings of fullness and hunger did not seem to differ, the researchers found that when the men ate slowly, they showed higher blood levels of two hormones -- peptide YY (PYY) and glucagon-like peptide 1 (GLP-1) -- for roughly three hours after the meal.

Both PYY and GLP-1 are released from the digestive tract as a "fullness" signal to the brain, curbing appetite and calorie intake.

The findings, to be published in an upcoming issue of the Journal of Clinical Endocrinology & Metabolism, give more weight to the conventional wisdom that people should savor their food.

Some previous research has found that when people take the time to chew their food thoroughly and enjoy a meal, they tend to eat fewer calories than when they have that same meal at an eat-and-run pace.

The reasons for that have been unclear, however.