Monday, November 25, 2013
Oatmeal Beats Ready-To-Eat Breakfast Cereal at Improving Appetite Control
While obesity is a complex and multifaceted problem, much of the strategy behind combating it boils down to healthy eating habits. Taking into account the primary role of subjective appetite sensations in said habits, a group of researchers recently compared the satiety impact of two popular breakfast choices: oatmeal and ready-to-eat breakfast cereal (RTEC). Their study, "Acute Effect of Oatmeal on Subjective Measures of Appetite and Satiety Compared to Ready-to-Eat Breakfast Cereal: A Randomized Crossover Study" is now available in the Journal of the American College of Nutrition, the Official Publication of the American College of Nutrition and a publication from Routledge.
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A sample of 48 healthy subjects 18 years of age and older were tested on 2 days, one including a breakfast of prepared oatmeal and the other an RTEC. Satiety feedback was collected prior to and at several points over the 4 hours following consumption, using visual analogue scale (VAS) ratings of hunger, fullness, stomach fullness, hedonic "satisfaction," and desire to eat. In addition, each breakfast treatment was run through physiochemical testing of β-glucan characterization, in vitro starch digestion kinetics and viscosity.
The findings indicate that "…the oatmeal breakfast resulted in a greater increase in perceptions of fullness and a greater decrease in perceptions of hunger, desire to eat, and prospective intake in the 4-hour period postprandial when compared with the RTEC," while ratings of satisfaction didn't differ significantly. These findings are consistent with physiochemical test results indicating that the β-glucan content of the oatmeal was more viscous due to its higher concentration and molecular weight, signaling a more satiating form of fiber.
While further research into other aspects of oatmeal's nutrient content and glucose/ endocrine satiety markers is called for, the results of this study suggest that choosing oatmeal for breakfast can prolong the period between meals and thus help establish habits conducive to weight loss.
Saturday, November 23, 2013
Comprehensive Health Benefit Reviews
I have completed an update of my comprehensive review of
The Health Benefits of a Mediterranean Diet
and The Health Benefits of Nut Consumption
To add to my current comprehensive reviews of the:
Health Benefits of Coffee
Health Benefits of Aspirin
Health Benefits of Statins
Health Benefits of Chocolate
Health Benefits of Vitamin D
Health Benefits of White and Green Tea Consumption
Health Benefits of Alcohol Consumption
Latest Health Research
I eat a handful or so of salt-free nuts (a little less than 1/2 peanuts - which are also apparently good for me) 6 days a week - I will try to eat some on Sundays as well after reading this:
Nut consumption = reduced death rate
In a study published today in the New England Journal of Medicine, researchers looked at the association of nut consumption with total and cause-specific mortality among 76,464 women in the Nurses' Health Study and 42,498 men in the Health Professionals Follow-up Study. Consumption of nuts, including tree nuts (such as almonds, Brazil nuts, cashews, hazelnuts, macadamias, pecans, pine nuts, pistachios and walnuts), was inversely associated with total mortality in both men and women, independent of other predictors for death. In addition, there were significant inverse associations for deaths due to cancer, heart disease and respiratory disease.
"Compared with those who did not eat nuts, individuals who consumed nuts (serving size of one ounce) seven or more times per week had a 20% lower death rate and this association was dose-dependent," Nuts contain important nutrients such as unsaturated fats, high quality protein, vitamins (i.e., vitamin E, folate and niacin) minerals (i.e., magnesium, calcium and potassium) and phytochemicals—all of which may offer cardioprotective, anticarcinogenic, anti-inflammatory and antioxidant properties.
I don't drink any sugar-sweetened beverages but probably need to cut back on desserts a little more:
Sugar-sweetened beverage consumption increases endometrial cancer risk
Postmenopausal women who reported the highest intake of sugar-sweetened beverages had a 78 percent increased risk for estrogen-dependent type I endometrial cancer (the most common type of this disease). This association was found in a dose-dependent manner: the more sugar-sweetened beverages a woman drank, the higher her risk.
A diet high in sugar and saturated fats increases the risk of premature death from any cause
Chronic inflammation appears to play a key role in the development of cancer, along with heart disease and diabetes. Now a new study presented today suggests that eating a diet high in sugar, saturated fats and others foods that promote inflammation increases the risk of premature death from any cause, including cancers of the gastrointestinal tract.
I'm doing better with coffee consumption:
Coffee may help perk up your blood vessels
The caffeine in a cup of coffee might help your small blood vessels work better, according to research presented at the American Heart Association's Scientific Sessions 2013.A study of 27 healthy adults showed – for the first time – that drinking a cup of caffeinated coffee significantly improved blood flow in a finger, which is a measure of how well the inner lining of the body's smaller blood vessels work. Specifically, participants who drank a cup of caffeinated coffee had a 30 percent increase in blood flow over a 75-minute period compared to those who drank decaffeinated coffee.
This is good news:
Statin Use Not Linked to a Decline in Cognitive Function
Aerobic exercise improves memory, brain function and physical fitness
A new study conducted by researchers at the Center for BrainHealth at The University of Texas at Dallas published online in the open-access journal Frontiers in Aging Neuroscience found that engaging in a physical exercise regimen helps healthy aging adults improve their memory, brain health and physical fitness.
I already take aspirin on non-soccer days at bedtime for its positive effect on blood pressure:
Bedtime aspirin may reduce risk of morning heart attack
I'm down to Co-Enzyme Q-10, Vitamins D-3 and B-12 and fish/fax seed oil:
Vitamins' Benefits: Experts Unconvinced
Even though millions of Americans pop a vitamin, mineral or multivitamin supplement every day, an influential government-appointed panel of experts says the jury is still out on whether they help boost health or not.
In its draft guidelines, the U.S. Preventive Services Task Force said that in some cases, certain supplements, such as beta carotene or vitamin E, may actually do more harm than good. Instead of focusing on supplements, they recommend that people focus on the health benefits of a well-balanced diet instead.
"In general, the Task Force found that there is not enough evidence to determine whether you can reduce your risk of cardiovascular disease or cancer by taking single or paired nutrients, or a multivitamin," Task Force Co-Chair Dr. Michael LeFevre said in a news release. "However, there were two major exceptions: beta carotene and vitamin E, both of which clearly do not help prevent these diseases."
I don't use them at home - I always wonder what my outside sources use:
Corn and safflower oil may actually increase risk of heart disease
I usually saute broccoli - probably no better than boiling:
Steaming Broccoli Preserves Potential Power to Fight Cancer
The way you prepare broccoli and related vegetables can alter their potentially cancer-fighting powers, new research shows.
Broccoli and other cruciferous vegetables are a good source of sulforaphane, a phytochemical (naturally occurring plant compound) that has shown strong anti-cancer properties in lab studies.However, the enzyme myrosinase in broccoli is needed for sulforaphane to form. If the myrosinase is destroyed, sulforaphane cannot form.
Researchers compared boiled, microwaved and steamed broccoli, and found that steaming broccoli for up to five minutes was the best way to retain its myrosinase. Boiling and microwaving broccoli for one minute or less destroyed the majority of the enzyme.
Health Benefits of Nut Consumption
Nut consumption = reduced death rate
In a study published in the New England Journal of Medicine, researchers looked at the association of nut consumption with total and cause-specific mortality among 76,464 women in the Nurses' Health Study and 42,498 men in the Health Professionals Follow-up Study. Consumption of nuts, including tree nuts (such as almonds, Brazil nuts, cashews, hazelnuts, macadamias, pecans, pine nuts, pistachios and walnuts), was inversely associated with total mortality in both men and women, independent of other predictors for death. In addition, there were significant inverse associations for deaths due to cancer, heart disease and respiratory disease.
"Compared with those who did not eat nuts, individuals who consumed nuts (serving size of one ounce) seven or more times per week had a 20% lower death rate and this association was dose-dependent," Nuts contain important nutrients such as unsaturated fats, high quality protein, vitamins (i.e., vitamin E, folate and niacin) minerals (i.e., magnesium, calcium and potassium) and phytochemicals—all of which may offer cardioprotective, anticarcinogenic, anti-inflammatory and antioxidant properties.
Tree nut consumption associated with reduced risk of pancreatic cancer in women
In a large prospective study published online in the British Journal of Cancer, researchers looked at the association between nut consumption and risk of pancreatic cancer among 75,680 women in the Nurses' Health Study, with no previous history of cancer. Consumption of nuts, including tree nuts (such as almonds, Brazil nuts, cashews, hazelnuts, macadamias, pecans, pine nuts, pistachios and walnuts), was inversely associated with risk of pancreatic cancer, independent of other potential risk factors for pancreatic cancer.
Women who consumed a one-ounce serving of nuts two or more times per week had a significantly reduced risk of pancreatic cancer compared to those who largely abstained from nuts.
New findings on tree nuts and health
Three new studies involving tree nuts (almonds, Brazil nuts, cashews, hazelnuts, macadamias, pecans, pine nuts, pistachios and walnuts) were presented this week at the Experimental Biology Meeting in Boston, MA. Tree nut consumption was associated with a better nutrient profile and diet quality; lower body weight and lower prevalence of metabolic syndrome; and a decrease in several cardiovascular risk factors compared to those seen among non-consumers.
Tree Nut Consumption = Lower Body Weight & Fewer Health Risks
In a study published in the Journal of the American College of Nutrition, researchers compared risk factors for heart disease, type 2 diabetes and metabolic syndrome of nut consumers versus those who did not consume nuts. Tree nut (almonds, Brazil nuts, cashews, hazelnuts, macadamias, pecans, pine nuts, pistachios and walnuts) consumption specifically, was associated with higher levels of high-density lipoprotein-cholesterol (good cholesterol) and lower levels of C-reactive protein, a marker for inflammation which can lead to a variety of chronic diseases including heart disease.
“One of the more interesting findings was the fact that tree nut consumers had lower body weight, as well as lower body mass index (BMI) and waist circumference compared to nonconsumers.
Nuts and Seeds for Health
by Dr. John Livesey, Department of Endocrinology Christchurch Hospital New Zealand
“Frequent eating of nuts appears to dramatically improve health. In particular, nut eating greatly lowers the risk of heart disease. In 1992 researchers working on the Adventist Health Study at Loma Linda University in California reported that those eating nuts daily had up to 60% fewer heart attacks than those who ate nuts less than once per month3. The beneficial effect of nut consumption was found for men, women, vegetarians, meat-eaters, fatter people, thinner people, the old, the young, those who did much exercise and those who did little exercise. The study was large, comprising 31,000 white Californian Seventh Day Adventists and similar benefits of nut eating were subsequently found for African Americans4. Prior to the publication of these results, nutritional advice had usually been to minimize nut consumption on the grounds that they were a "fatty" food.
Four other large studies have since confirmed the benefits to the heart of nut eating. In addition to the cardiac benefits of consuming nuts, the risks of having a stroke, of developing type 2 diabetes, of developing dementia, of advanced macular degeneration and of gallstones have all been found to be lowered by eating nuts.
Calculations suggest that daily nut eaters gain an extra five to six years of life free of coronary disease14 and that regular nut eating appears to increase longevity by about 2 years..
The more often nuts are eaten the better as the benefits appear to increase as the frequency of nut consumption increases. The risk of fatal coronary disease and the risk of developing type 2 diabetes both appear to decrease steadily as nut consumption increases from less than once a week to once or more per day.
Just what quantity of nuts should be eaten? The studies above suggest that 30 to 60 grams (1-2oz) of nuts should be consumed daily to gain the maximum benefits seen. Whether even larger amounts confer further benefits is currently unknown.
Nuts are of course a fatty food and many might worry that they will put on weight by eating more nuts. After all, 30 grams (or one ounce) of most nuts contain about 800 kilojoules (200 kilocalories). Happily though, on present evidence, nuts do not seem to cause weight gain1,17. For example in the Nurses' Study the frequent nut consumers were actually a little thinner on average than those who almost never consumed nuts6, and daily supplements of almonds or peanuts for six months resulted in little or no increase in body weight18. Nuts appear to satisfy hunger sufficiently well to appropriately reduce the consumption of other food.
Which nuts are best?
The definitive answer to this question is currently unknown. In the Adventist Study about about 32 percent of the nuts eaten were peanuts, 29 percent almonds, 16 percent walnuts, and 23 percent other types. These researchers did not ascertain whether the nuts were fresh, oil-roasted, or dry-roasted. The Nurses' Study found that peanuts, which are legumes, appeared to be just as effective in reducing the risk of coronary heart disease as tree nuts. Experiments where volunteers were fed nuts as part of their diet for several weeks have found that walnuts19-22, almonds22-25, hazelnuts26, peanuts27, pecans28, pistachio nuts29 and macadamia nuts30 all alter the composition of the blood in ways that would be expected to reduce the risk of coronary disease. Chestnuts, a nut unusually low in fat, do not yet seem to have been studied. The best advice currently is probably to eat a variety of nuts.”
Researchers found that people who eat nuts regularly have lower risks of heart disease. In 1996, the Iowa Women's Healthy Study found that women who ate nuts more than 4 times a week were 40% less likely to die of heart disease. Two years later, another study conducted by the Harvard School of Public Health found a similar result in another group of women subjects. Furthermore, potential heart health benefits of nuts were also found among men. In 2002, the Physician's Health Study found that men who consumed nuts 2 or more times per week had reduced risks of sudden cardiac death.
FDA only approved the heart health claim for almonds, hazelnuts, peanuts, pecans, some pine nuts, pistachios and walnuts as these nuts contain less than 4g of saturated fats per 50g. The FDA said: "Scientific evidence suggests but does not prove that eating 1.5 oz per day of most nuts as part of a diet low in saturated fat and cholesterol may reduce the risk of heart disease."
Friday, November 22, 2013
Sugar-sweetened beverage consumption increases endometrial cancer risk
Postmenopausal women who consumed sugar-sweetened beverages were more likely to develop the most common type of endometrial cancer compared with women who did not drink sugar-sweetened beverages, according to a study published in Cancer Epidemiology, Biomarkers & Prevention, a journal of the American Association for Cancer Research.
Postmenopausal women who reported the highest intake of sugar-sweetened beverages had a 78 percent increased risk for estrogen-dependent type I endometrial cancer (the most common type of this disease). This association was found in a dose-dependent manner: the more sugar-sweetened beverages a woman drank, the higher her risk.
"Although ours is the first study to show this relationship, it is not surprising to see that women who drank more sugar-sweetened beverages had a higher risk of estrogen-dependent type I endometrial cancer but not estrogen-independent type II endometrial cancer," said Maki Inoue-Choi, Ph.D., M.S., R.D., who led this study as a research associate in the Division of Epidemiology and Community Health of the University of Minnesota School of Public Health in Minneapolis. "Other studies have shown increasing consumption of sugar-sweetened beverages has paralleled the increase in obesity. Obese women tend to have higher levels of estrogens and insulin than women of normal weight. Increased levels of estrogens and insulin are established risk factors for endometrial cancer."
Because this study is the first to show the association between high sugar-sweetened beverage consumption and endometrial cancer, such findings need replication in other studies, according to Inoue-Choi.
Inoue-Choi and colleagues used data from 23,039 postmenopausal women who reported dietary intake, demographic information, and medical history in 1986, prior to the cancer diagnosis, as part of the Iowa Women's Health Study.
Dietary intake was assessed using the Harvard Food Frequency Questionnaire (FFQ), which asked study participants to report intake frequency of 127 food items in the previous 12 months. A typical portion size for each food item was provided to give study participants a sense of scale.
As reported in the study, the FFQ included four questions asking usual intake frequency of sugar-sweetened beverages, including 1) Coke®, Pepsi®, or other colas with sugar; 2) caffeine-free Coke®, Pepsi®, or other colas with sugar; 3) other carbonated beverages with sugar (e.g., 7-Up®); and 4) Hawaiian Punch®, lemonade, or other noncarbonated fruit drinks.
"Sugar-free soft drinks" included low-calorie caffeinated and caffeine-free cola (e.g., Pepsi-Free®), and other low-calorie carbonated beverages (e.g., Fresca®, Diet 7-Up®, and Diet Ginger Ale®).
The "sweets and baked goods" category comprised 13 items in the FFQ, including chocolate, candy bars, candy without chocolate, cookies (home-baked and ready-made), brownies, doughnuts, cakes (home-baked and ready-made), sweet rolls, coffeecakes or other pastries (home-baked and ready-made), and pies (home-baked and ready-made).
The researchers categorized the sugar-sweetened beverage consumption patterns of these women into quintiles, ranging from no intake (the lowest quintile) to between 1.7 and 60.5 servings a week (the highest quintile).
Between 1986 and 2010, 506 type I and 89 type II endometrial cancers were recorded among the women Inoue-Choi and colleagues studied. They did not find any association between type I or type II endometrial cancers and consumption of sugar-free soft drinks, sweets/baked goods, and starch.
"Research has documented the contribution of sugar-sweetened beverages to the obesity epidemic," said Inoue-Choi. "Too much added sugar can boost a person's overall calorie intake and may increase the risk of health conditions such as obesity, diabetes, heart disease, and cancer."
Wednesday, November 20, 2013
Coffee may help perk up your blood vessels
The caffeine in a cup of coffee might help your small blood vessels work better, according to research presented at the American Heart Association's Scientific Sessions 2013.
A study of 27 healthy adults showed – for the first time – that drinking a cup of caffeinated coffee significantly improved blood flow in a finger, which is a measure of how well the inner lining of the body's smaller blood vessels work. Specifically, participants who drank a cup of caffeinated coffee had a 30 percent increase in blood flow over a 75-minute period compared to those who drank decaffeinated coffee.
"This gives us a clue about how coffee may help improve cardiovascular health," said Masato Tsutsui, M.D., Ph.D., lead researcher and a cardiologist and professor in the pharmacology department at the University of the Ryukyus in Okinawa, Japan.
The study adds to a growing body of research about coffee, the most widely consumed beverage worldwide. Previous studies showed that drinking coffee is linked to lower risks of dying from heart disease and stroke, and that high doses of caffeine may improve the function of larger arteries.
Study participants were people who did not regularly drink coffee, ranging in age from 22 to 30. On one day, each participant drank one five-ounce cup of either regular or decaffeinated coffee. Then researchers measured finger blood flow with laser Doppler flowmetry, a non-invasive technique for gauging blood circulation on a microscopic level. Two days later, the experiment was repeated with the other type of coffee. Neither the researchers nor the participants knew when they were drinking caffeinated coffee.
The researchers noted blood pressure, heart rate, and vascular resistance levels. They also took blood samples to analyze levels of caffeine and to rule out the role of hormones on blood vessel function.
Compared to decaf, caffeinated coffee slightly raised participants' blood pressure and improved vessel inner lining function. Heart rate levels were the same between the two groups.
Excessive testosterone raises mortality risk in older men
Chevy Chase, MD—Older men whose testosterone levels were neither low nor high tended to live longer, according to new research accepted for publication in The Endocrine Society's Journal of Clinical Endocrinology & Metabolism.
Testosterone is a key male sex hormone involved in maintaining sex drive, sperm production and bone health. Physicians have long known that low testosterone levels can signal health problems, but the new study found men may not fare better when levels of the hormone rise too high.
"Older men who had testosterone in the middle range survived longer than their counterparts who had either low or high levels of the hormone," said the study's lead author, Bu Beng Yeap, MBBS, FRACP, PhD, of the University of Western Australia, based in Fremantle Hospital, Western Australia. "When the body metabolizes testosterone, it produces dihydrotestosterone (DHT), which is tied to a lower risk of dying from ischemic heart disease. Having the right amount of testosterone and higher levels of DHT might indicate these men are in better health overall, or it could help them maintain good health as they grow older."
The population-based cohort study analyzed the mortality rate in a group of 3,690 community-dwelling men between the ages of 70 to 89 in Perth, Western Australia. Participants' testosterone and DHT levels were measured between 2001 and 2004. Researchers analyzed the group's survival rate as of December 2010.
Researchers divided the men into four groups based on their testosterone levels. Men with the lowest testosterone levels had the highest cumulative mortality rate, followed by the men with the highest testosterone levels. Men with circulating testosterone levels in the 9.8 to 15.8 nmol/L range tended to live longer.
"Sex hormones are an important predictor of mortality in older men, but we haven't determined if treatments to change testosterone and DHT levels can alter these outcomes," Yeap said. "Additional research into these findings, including randomized clinical trials, could help identify ways to leverage this information to improve health in older men."
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