A CHANGING VIEW OF THE GUT
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OVERVIEW OF THE AUTONOMIC NERVOUS SYSTEM
The autonomic nervous system governs many body functions. The key to fat loss and blood sugar balance is to tip the balance of this system in direction of the parasympathetic nervous system.
There are two divisions of your nervous system running on autopilot in the background: the parasympathetic nervous system, or the rest and digest system, and the sympathetic nervous system, the “fight or flight” response. We are hardwired to survive as if we lived in prehistoric times when life expectancy was contingent upon surviving predators, starvation, and infection. When prehistoric man was fighting or fleeing from a life-threatening altercation, our nervous system pivoted out of rest and digest status (parasympathetic dominance) into fight or flight mode (sympathetic dominance).
Such a shift in nervous system signaling drives the adrenals to release more stress hormones, which increases blood sugar, constricts blood vessels, raises blood pressure, and speeds heart rate. The shift also reallocates nutrients and blood to the lungs, heart, muscle tissue, and brain. Digestion, muscle building, production of growth and sex hormones—all of which are activated by the vagus nerve of the parasympathetic nervous system—come to a screeching halt, since these activities aren’t critical to survival during life-or-death situations. However, that’s not true in the long term.
GIVING DIGESTION A BOOST FROM THE HEART
One of my most effective tips for weight loss is helping clients to practice meditative breathing prior to a meal. Eating in a rushed, stressed physiological state leads to poor chewing, improper digestion, and imbalanced gut microflora. In contrast, mindful strategies such as deep breathing will increase the “rest and digest” or parasympathetic nervous system including the vagus nerve, which activates digestive juices and gut hormones such as CCK and GLP-1. Vagus nerve activation is key to optimal digestive health.
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ACTIVATE YOUR VAGUS NERVE
The modern-day challenge is that your body interprets present-day life stressors—traffic, work overload, sleep disturbances—as though they are life threats. The morning and evening rush-hour commute, work deadlines, financial uncertainties, and even the Western diet, lock our nervous system thermostat on stress and inflammation mode. Intestinal bacterial imbalances and associated leaky gut lead to increased absorption of endotoxin, driving the stressful, inflammatory branch of our nervous system.
Since inflammation disrupts metabolism and normal hormone functioning, this leads to insulin resistance, prediabetes, and other obesity-related abnormalities.
THE MIND-BODY CONTROL OF DIGESTION AND INFLAMMATION
Mind-body therapies such as HeartMath, yoga, and meditation ignite a powerful anti-inflammatory pathway in the body via the vagus nerve. Vagus nerve activation is also required to properly turn on digestive secretions as well as prompt movement of the gastrointestinal tract.
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Course Contents
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In recent years, scientists from around the world have linked imbalances in gut microbes with a range of modern health epidemics, including autoimmunity, asthma, allergies, depression, mood disorders, acne, heart disease, diabetes, and obesity.[/text_block]
Scientific evidence has also linked increased blood levels of endotoxin to obesity and diabetes. Intestine-derived endotoxin exit the intestine and penetrate the interior of the body in one of two ways: they either pass through breaches in the damaged intestinal barrier (a condition also known as leaky gut) or merge among ingested fats for transport into the body. This is why excessive intake of dietary fats can inadvertently lead to increased absorption of endotoxin and all the ailments that accompany them. In the gut, liver, and other tissues, bacterial endotoxin latch onto immune receptors, propelling the immune system into a state of inflammation.
It’s this increased immune vigilance that causes aberrations in blood glucose, lipid, and fat-storing hormones, such as insulin, that are characteristics of obesity and prediabetes.[/text_block]
Overview of How Gut-Derived Endotoxin Leads to Weight Gain
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Coming Up: Video 2
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How Endotoxin Causes Leptin Resistance
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Associated Expert Interview
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Mark Houston, MD: Leaky Gut, Endotoxin and Heart Disease
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