What triggers hunger?
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Dr. Mehmet Oz answered:Your stomach and intestines do more than hold food and produce Richter-worthy belches. When your stomach's empty, it releases a feisty little chemical called ghrelin. When your stomach's growling, it's this gremlin of a hormone makes you want to eat. Yes, ghrelin is the culprit that's sending desperate messages that you need to devour a dozen chili dogs immediately.
To make things worse, when you diet through deprivation, the increased ghrelin secretion sends even more signals to eat, overriding your willpower and causing chemical reactions that give you little choice but to line your tongue with bits of beef jerky.
Ghrelin also promotes eating by increasing the secretion of growth hormone (ghre is the Indo-European root word for growth). So when you increase ghrelin levels, you stimulate that growth hormone to kick in, and growth hormone builds you not only up, but out as well.
An interesting note: scientists found how ghrelin works accidentally: In gastric bypass surgery, doctors cut out the part of the stomach that secretes ghrelin. They soon realized that it wasn't just the smaller stomachs, but the reduced ghrelin production that helped surgery patients eat less food. The eat-everything signal was shut off, clearing the way for the satiety center to take care of its business.
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Your stomach and intestines do more than hold food and produce Richter-worthy belches. When your stomach's empty, it releases a feisty little chemical called ghrelin. When your stomach's growling, it's this gremlin of a hormone makes you want to... More -
Weight Watchers® answered:Hunger can be triggered by physiological, environmental and emotional factors, and so it can be difficult to figure out the best times to eat and not overdo it.
Weight Watchers offers a comprehensive approach to weight loss that can help you reach your goals. Learn more about Weight Watchers and how to join.
People can often recognize physical hunger by a growling stomach or a slightly nauseous and/or light-headed feeling. This usually happens after an extended period without food (anywhere from approximately three to six hours). Eating is the appropriate response to signs of physical hunger and learning skills to identify your hunger signals are important for lasting weight management.
Eating when you’re hungry and stopping when you’re satisfied can prepare the way for managing other types of hunger.Hunger can be triggered by physiological, environmental and emotional factors, and so it can be difficult to figure out the best times to eat and not overdo it. People can often recognize physical hunger by a growling stomach or a slightly... More -
Manuel Villacorta of Academy of Nutrition and Dietetics answered:Hunger hormone ghrelin triggers hunger as Dr. Oz mentioned. You can control ghrelin by making sure you eat throughout the day. I normally recommend my clients to eat every 3-4 hours and to make sure include protein and healthy carbs when eating.
For example, if you eat a salad, add chicken, fish, or tofu (protein) as well as a healthy whole grain such as brown rice, quinoa, or beans (carbs). Use this technique when snacking too. Try an apple (carb) and some string cheese (protein).
Hunger hormone ghrelin triggers hunger as Dr. Oz mentioned. You can control ghrelin by making sure you eat throughout the day. I normally recommend my clients to eat every 3-4 hours and to make sure include protein and healthy carbs when... More -
Joan Salge Blake of Academy of Nutrition and Dietetics answered:Various physiologic feedback mechanisms involving the mouth, stomach, intestines, and brain all work together to increase or decrease your hunger. Many hormones play a role. When your stomach is empty, the hormone ghrelin, which is produced mainly in the stomach, signals your brain that you need to take in food. Your body produces more ghrelin during fasting (such as between meals) in order to stimulate hunger, and it produces less after food is consumed.
Another hormone, leptin, which is produced in fat tissue, helps regulate your body fat by affecting hunger. As your fat stores increase, leptin signals the brain to decrease your level of hunger and food intake.
Once food enters your mouth, sensory signals are sent to the brain that tell you whether or not to continue eating. The feedback mechanism is very much affected by your prior experience of tasting that food.
Various physiologic feedback mechanisms involving the mouth, stomach, intestines, and brain all work together to increase or decrease your hunger. Many hormones play a role. When your stomach is empty, the hormone ghrelin, which is produced mainly... More -
Dr. Joel Fuhrman answered:We commonly call the feeling of wanting or needing to eat "hunger," but to understand hunger, we need to address four important considerations: volume, nutrients, calories, and addictions.
1) Volume: You must consume an adequate amount of food, and fiber from that food, to physically feel satiated.
2) Nutrients: You must consume enough nutrients in your food for your body to meet its biological need to thrive. Even if you have adequate volume, if it's from low-nutrient food, your body will have a nutrient deficit, and you will feel you require more food.
3) Calories: You will be driven to overconsume calories unless you get enough volume and nutrients for your body to feel satiated.
4) Addictions: You must put an end to your addictions to food, which often manifest themselves in discomfort and cravings. If you don't, your body will not be able to regulate its caloric needs appropriately.
As you can see, each of these dimensions addresses your body's need for food, but none of them exists independently. If one dimension is not tended to, the others will be thrown off.
Find out more about this book: Eat for Health: Lose Weight, Keep It Off, Look Younger, Live Longer (2 Volu...
We commonly call the feeling of wanting or needing to eat "hunger," but to understand hunger, we need to address four important considerations: volume, nutrients, calories, and addictions. 1) Volume: You must consume an adequate amount of... More
