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How does fiber make me feel full?

Not only do high fiber sources like fruits and vegetables tend to be low in calories, but the fiber they contain slows digestion, which helps to keep you feeling full. For example, an apple is more filling than apple juice because of the fiber it contains. Additionally, foods that contain fiber often take longer to chew, giving you time to realize that you are satisfied on a smaller portion. A high fiber diet has also been linked to other health benefits including lower blood cholesterol levels, better blood sugar control, and bowel regularity.
Since foods rich in fiber absorb a lot of water and stay in the stomach longer, they may help create a full feeling long after a meal is finished.

Because of the bulk they add to a meal, high-fiber foods also require more chewing than many low-fiber foods, so you are likely to eat less, eat slower, and still feel satisfied. High-fiber foods also tend to be low in calories and fat.

Weight Watchers offers a comprehensive approach to weight loss that can help you reach your goals.
High fiber foods digest much more slowly in the body. Therefore, food stays in your stomach longer helping you to feel full faster and longer as well. High fiber foods also expand more in the presence of liquids- so when you drink water while eating foods high in fiber, it will expand to take up more room in your stomach, helping you to feel fuller.
Dr. Mehmet Oz, MD
Cardiology (Cardiovascular Disease)
Many of us may associate fiber with better health and increased toilet time, but fiber is the speed bump of your gastrointestinal interstate. It slows everything way down.

Technically, it works by slowing the transit of food across the ileocecal valve (which sends signals from the small intestines to the large intestines)—keeping your stomach fuller for longer.

The result: A greater feeling of satiety and increase of appetite-suppressing CCK-like signals (CCK is a peptide in the gastrointestinal tract that signals fullness).

Besides controlling blood sugar levels and decreasing insulin levels, fiber also reduces calorie intake for up to 18 hours a day.

This is why getting an adequate daily supply of fiber—and loading up at breakfast—can help you lose weight.
YOU: On A Diet Revised Edition: The Owner's Manual for Waist Management

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YOU: On A Diet Revised Edition: The Owner's Manual for Waist Management

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.