Protein Power: It”™s Not Just for Muscles (Part 2 — Appetite Control)
By Joan Kent, PhD, and Shawn Bevington
Protein is used to make hormones, which are messengers in the body. They”™re produced in one part of the body and then distributed — through blood, interstitial or other body fluid — to other organs or tissues. There they modify activity and function.
This brief post will focus on just a few hormones and how they affect appetite.
*CCK (Cholecystokinin) - Satiety is the feeling that you don”™t need another meal because you”™re still satisfied from the last one.
CCK is arguably the most powerful satiety hormone in the body. It reduces appetite by stimulating the function of the brain”™s key satiety center, the VMH (ventromedial hypothalamus).
CCK is released when we eat protein and fats. It affects our food preferences by reducing the desire for carbs.
Anyone who suffers from an exaggerated desire for carbs probably needs to eat more protein. Vegans, for example, may experience strong cravings for carbs, including sugars. Finding a true protein source is a key factor in reducing vegans”™ cravings. More on that in Part 3.
Eating adequate protein can also be key in conquering sugar addiction for this same reason.
*Ghrelin - Ghrelin increases appetite by stimulating the brain”™s lateral hypothalamus. The LH can be seen as a ‘feeding”™ center.
Eating protein can help to reduce ghrelin release. In healthy men, a high-protein breakfast decreased post-meal ghrelin levels more than a high-carb breakfast. The high-protein meal also slowed gastric emptying. Researchers attributed both effects to the secretion of CCK and glucagon, both triggered by protein.
*Glucagon - Glucagon is a hormone made in the pancreas. Insulin is, as well, but the functions of the two hormones are oppositional and work to balance glucose levels.
Insulin also tends to be a fat-storage hormone, while glucagon moves fats out of storage and into the blood stream so they can be utilized as fuel, rather than stored.
While many foods trigger the release of insulin, only protein foods trigger glucagon. Glucagon is also secreted when we exercise.
As mentioned above, glucagon and CCK seem to control appetite by modifying ghrelin levels.
Don”™t miss protein and brain chemistry, age, and the vegan solution in Part 3, right here this week!
Shawn Bevington is a holistic health coach, certified by the National College of Exercise Professionals (NCEP). He has been a fitness trainer for six years, and boasts another seven years of activity in various programs, including football, shot-put, pro wrestling and other strenuous sports. Self-motivated, Shawn has spent years researching on his own – and putting that information into practice with his clients. His knowledge, skill and experience have made him a sought-after fitness trainer, both by clients and by colleagues who bring questions to him.
Dr. Joan Kent has a PhD in Psychoactive Nutrition. She was the first to document the brain chemical pathways of sugar addiction and to explain the sugar/fat seesaw hormonally and chemically. Joan has helped hundreds and hundreds of clients with metabolic conditions — diabetes, hypertension, heart disease, cancer — as well as clients with inflammation and mood disorders. Joan has written 2 best-selling books: Stronger Than Sugar, on conquering sugar addiction, and The Sugar-Free Workout, on fueling before, during and after training for optimal performance. Visit www.LastResortNutrition.com and grab your free gifts.
Joey is a certified personal trainer, group fitness specialist and the lead Master Trainer for Cycling Fusion. Joey currently teaches indoor cycling at several Pittsburgh clubs and loves to fuse his passion for the ride with his love of training, technology and of course the music.
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