Visceral fat

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Hunger Free Forever: The New Science of Appetite Control Michael T. Murray and Michael R. Lyon See book keywords and concepts

Cortisol, visceral fat, and Appetite Cortisol exerts a double whammy on fat cells in the abdomen: 1) it stimulates their growth; and 2) it stimulates the manufacture of new abdominal fat cells. So not only does Cortisol signal the brain to eat more, it increases the amount of visceral (abdominal) fat. As you will recall, when visceral fat increases, it leads to the release of hormones that block the action of insulin and promote the appetite. Cortisol also adversely affects appetite and promotes the craving of carbohydrates by lowering brain serotonin levels.

Stop Prediabetes Now: The Ultimate Plan to Lose Weight and Prevent Diabetes Jack Challem See book keywords and concepts

Subcutaneous fat is stored under the skin of the belly, and visceral fat is intertwined around organs in the midsection. Both subcutaneous and visceral fat secrete inflammation-causing substances that further harm the body. Measuring Your Body Proportions and Belly Fat How do you measure your belly fat? The simplest method is to stand naked in front of a mirror without sucking in your gut. If your belly sticks out from your chest (not counting your breasts, if you're a woman), you have too much belly fat. Another way is to measure your waist, but don't use your belt size.

Nutrition in the Prevention and Treatment of Disease Ann M. Coulston and Carol J. Boushey See book keywords and concepts

Human evidence that the apolipoprotein a-II gene is implicated in visceral fat accumulation and metabolism of triglyceride-rich lipoproteins. Circulation 104, 1223-1228. 226. Takada, D., Emi, M., Ezura, Y., et al. (2002). Interaction between the LDL-receptor gene bearing a novel mutation and a variant in the apolipoprotein A-II promoter: molecular study in a 1135-member familial hypercholesterolemia kindred. J. Hum. Genet. 47, 656-664. 227. Lara-Castro, C, Hunter, G. R., Lovejoy, J. C, Gower, B. A., and Fernandez, J. R. (2005).

Visceral fat accumulation as a risk factor for prostate cancer. Obes. Res. 12, 1930-1935. 175. Freedland, S. J., Terris, M. K, Platz, E. A., and Presti, J. C. Jr., (2005). Body mass index as a predictor of prostate cancer: Development versus detection on biopsy. Urology 66,108-113. 176. Rodriguez, C, Patel, A. V., Calle, E. E., Jacobs, E. J., Chao, A., and Thun, M. J. (2001). Body mass index, height, and prostate cancer mortality in two large cohorts of adult men in the United States. Cancer Epidemiol. Biomarkers Prev. 10, 345-353. 177. Engeland, A., Tretli, S., and Bjorge, T. (2003).

A weak positive association was found with waist-to-hip ratio, but visceral fat was not the main mediating factor between stress and diabetes [171]. It has been suggested that the link between stress and diabetes may be through other factors such as the chronic stimulation of the autonomic nervous system and its resulting hyperglycemia [171, 172]. More recently, the inflammatory consequences of psychologic stress have been proposed as the link to insulin resistance and diabetes [173].

A high BMI alerts the provider that a client is carrying too much body fat, whereas a high waist circumference signals that a significant amount of the excess fat is visceral fat. High risk is defined by a waist circumference >40 inches (102 cm) for men and >35 inches (88 cm) for women [5]. The power of waist circumference to predict disease risk may vary by ethnicity and age [12] as waist circumference is a better disease risk indicator than BMI in Asian Americans and in older individuals.

During long-term energy deficit induced by exercise training, intrapair resemblance was observed for changes in body weight, fat mass, percentage fat, and abdominal visceral fat [11]. One explanation for these differences is that some twin pairs were found to be better oxidizers of lipid, as evidenced by reduced respiratory quotient, during submaximal work than were other twin pairs [11]. An important component of the interindividual difference in response to overeating may be individual differences in spontaneous physical activity or "fidgeting" [12, 13].

Metabolic Alterations in Obesity That Predispose to Type 2 Diabetes Mellitus Total fatness and a body fat distribution that reflects visceral fat cell hypertrophy [81, 82] alter the metabolism of glucose: Both are associated with more insulin resistance than observed in obese individuals with lower-body adiposity [132, 133], greater breakdown of the stored fat in adipose cells [134] and elevated plasma nonesterified free fatty acid concentrations, which can lead to impaired glucose tolerance [135-138]. See Table 5. 1.

Hunger Free Forever: The New Science of Appetite Control Michael T. Murray and Michael R. Lyon See book keywords and concepts

As you will recall, when visceral fat increases, it leads to the release of hormones that block the action of insulin and promote the appetite. Cortisol also adversely affects appetite and promotes the craving of carbohydrates by lowering brain serotonin levels. Serotonin is an important brain chemical that promotes a sense of relaxation and positive mood (happiness). When your brain is low in serotonin, carbohydrate cravings result. What the brain is trying to accomplish by signaling a carbohydrate craving is increasing the manufacture of serotonin from the amino acid tryptophan.

Supplement Your Prescription: What Your Doctor Doesn't Know About Nutrition Hyla Cass See book keywords and concepts

Fat cells in the belly, also called visceral fat, create a lot of inflammation. If you're insulin resistant or diabetic, the state of high insulin and high blood sugar is creating even worse inflammation. This inflammation creates plaques in the twists and turns of the blood vessels that feed the muscular walls of the heart. This, in turn, drastically increases your risk of having a heart attack. Where does that "bad" LDL (low-density lipoprotein) cholesterol come in? It's used as a sort of spackling and filling material within those plaques.

Stop Prediabetes Now: The Ultimate Plan to Lose Weight and Prevent Diabetes Jack Challem See book keywords and concepts

Both subcutaneous and visceral fat secrete inflammation-causing substances that further harm the body. Measuring Your Body Proportions and Belly Fat How do you measure your belly fat? The simplest method is to stand naked in front of a mirror without sucking in your gut. If your belly sticks out from your chest (not counting your breasts, if you're a woman), you have too much belly fat. Another way is to measure your waist, but don't use your belt size. Men tend to wear their belts below their waists, leading them to think they're thinner than they really are.

Superfoods Rx Diet: Lose Weight with the Power of SuperNutrients Wendy Bazilian, DRPH, MA, RD, Steven Pratt, MD, Kathy Matthews See book keywords and concepts

Those who were fed fish oil developed less visceral fat, which refers to the fat surrounding the organs that is difficult to reduce and a major risk factor for cardiovascular disease17. These fish oil-fed mice also had lower leptin levels and, as we've seen, these lower levels of the hormone leptin would help regulate both appetite and metabolism. Another study on mice found that the quality of dietary fat—in this case omega-3 fatty acids versus saturated fat—could actually affect the hormones that in turn affect the hypothalamic satiety center.

Mastering Leptin: The Leptin Diet, Solving Obesity and Preventing Disease, Second Edition Byron J. Richards, CCN See book keywords and concepts

Furthermore, CT scans of their abdominal areas showed significantly reduced visceral fat (abdominal fat), the type of fat around important body organs that is the largest concern for fat-associated serious disease.354 This study is important because it proves this nutrient helps metabolize the type of fat, abdominal fat, that is most associated with the onset of disease. It changes the problem of excess Cortisol and leptin resistance.

Gary Null's Power Aging Gary Null See book keywords and concepts

Further analysis also shows a regulatory role for testosterone in counteracting the accumulation of visceral fat, or fat surrounding internal organs. Along with this, epidemiological data demonstrate that relatively low testosterone levels pose a risk for the development of visceral obesity. One study shows that serum estrone and estradiol (both kinds of estrogen) were elevated twofold in one group of morbidly obese men. Male hormones cdnyert into estrogens when fat cells synthesize the aromatase enzyme.

Disease Prevention and Treatment The Life Extension Editorial Staff See book keywords and concepts

The increase in adipose tissue is connected to an increase in the enzyme aromatase which converts testosterone to estradiol and leads to diminished testosterone levels and the deposition of visceral fat. As the total body fat mass increases, hormone resistance for insulin ultimately develops (Cohen 2001). For women, it is now well established that the decline in testosterone and the adrenal preandrogens also plays a significant role in affecting perimenopausal and menopausal symptomatology and quality of life.

Further analysis has also disclosed a regulatory role for testosterone in counteracting visceral fat accumulation. Longitudinal epidemiological data demonstrate that relatively low testosterone levels are a risk factor for development of visceral obesity (Tenovet 1992; Marin et al. 1998). In one group of morbidly obese men, a study showed that serum estrone and estradiol were elevated twofold. Fat cells synthesize the aromatase enzyme, causing male hormones (testosterone and others) to convert to estrogens (Deslypere et al. 1985).

Further analysis has also disclosed a regulatory role for testosterone in counteracting visceral fat accumulation. Epidemiological data demonstrate that relatively low testosterone levels are a risk factor for development of visceral obesity (7, 237). One study showed that serum estrone and estradiol were elevated twofold in one group of morbidly obese men. Fat cells synthesize the aromatase enzyme, causing male hormones to convert to estrogens (278).

After adjustment for the gains in fat mass, the within-pair similarity was particularly evident with respect to the changes in regional fat distribution and amount of abdominal visceral fat, with about 6 times as much variance among pairs as within pairs. Researchers concluded that the tendency to store energy as either fat or lean tissue is influenced by genetic factors (Bouchard et al. 1990). • A condition known as Dunnigan-type familial partial lipodystrophy (FPLD) bears striking similarities to Syndrome X.

Defeating Diabetes Brenda Davis and Tom Barnard See book keywords and concepts

Those with greater levels of visceral fat are at higher risk for diabetes, poor glycemic control, and heart disease than those with mostly subcutaneous fat. Why are so many of us overweight or obese? Why wouldn't we be? We've created an ideal environment for weight gain. Almost every aspect of our society supports overeating and underactivity. We no longer spend hours running through dense forests in search of food. We simply open the refrigerator or freezer, pop a ready-made snack or meal into the microwave, and presto, instant satisfaction.

Disease Prevention and Treatment The Life Extension Editorial Staff See book keywords and concepts

University of Vermont's Laboratory for Clinical Biochemistry Research), declares that individuals who are not obviously overweight may still have a disproportionate amount of visceral fat. The increased risk of insulin resistance and atherosclerotic disease associated with visceral obesity may be explained through upregulation of cytokine secretion (Tracy 2001). In addition, hyperinsulinemia changes the disposition of cytokines. The liver, receiving instructions from cytokines, releases stored fat and sugar into the bloodstream. As body fat increases, insulin resistance increases, as well.

Healing Moves: How To Cure, Relieve, And Prevent Common Ailments With Exercise Carol Krucoff and Mitchell Krucoff, M.D. See book keywords and concepts

In general, if the abdominal circumference is greater than forty inches in men (or thirty-five inches in women), there is a good chance you have significant visceral fat, which puts you at greater health risk. It's not necessary (or even, for some people, possible) to totally deflate a spare tire to boost health. For people who are obese, even small weight losses of 5 to 10 percent of body fat can reduce their health risks. The best way to lose fat and keep it off is by eating healthy portions of a nutritious diet and exercising regularly.

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