Sweet Potato Greens and Prostate Cancer

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New research suggests that sweet potato greens may have a role in prostate cancer prevention and treatment.



SWEET POTATO GREENS AND PROSTATE CANCER

As I discuss in my bestselling evidence-based book, A Cancer Prevention Guide for the Human Race, even conservative clinical research assessments strongly suggest that at least 50 percent of all new cancer cases are linked to modifiable lifestyle and dietary habits.  Polyphenols, a group of powerful dietary antioxidant compounds that I extensively discuss in A Cancer Prevention Guide for the Human Race, have been extensively studied in numerous laboratory and clinical research studies as potential cancer prevention nutrients.  Now, a newly published study suggests that polyphenol-rich sweet potato greens may have significant anticancer activity against prostate cancer

In this new study, which appears in the current issue of the journal Carcinogenesis, an extract of sweet potato greens was first tested in the laboratory with human prostate cancer cells growing in culture.  Molecular studies were then performed, which revealed that sweet potato greens extract shut down important cell growth biochemical pathways in human prostate cancer cells, and accelerated cancer cell death through a mechanism known as apoptosis.  (Interestingly, and importantly, however, sweet potato greens extract appeared to have no adverse effects on normal human prostate gland cells.)

As it is well known that the results of laboratory-based studies often cannot be reproduced in animal or human studies, the authors of this study then implanted human prostate cancer cells into laboratory mice.  These same mice were then fed sweet potato greens extract (400 milligrams per kilogram per day), while another group of mice (the “control group”) did not receive any sweet potato greens extract.  At the end of the study, the scientists conducting this research discovered that the prostate cancer tumors growing in the mice who received the sweet potato greens extract were, on average, almost 70 percent smaller than the tumors growing in the control group mice!  (Once again, there also appeared to be no adverse effects on normal tissues and organs in the mice that received the sweet potato greens extract.)

This research study is the first study to identify significant anticancer effects against prostate cancer associated with sweet potato greens in both cancer cell cultures and in mammals.  The potent anticancer effects of sweet potato greens extract, as demonstrated in this very elegant study, and combined with the apparent lack of toxicity, suggest that this polyphenol-rich vegetable may have a role in prostate cancer prevention and, perhaps, prostate cancer treatment; although it will be necessary to repeat this laboratory study in humans to determine if sweet potato greens have similar anticancer effects in people.

For a groundbreaking overview of cancer risks, and evidence-based strategies to reduce your risk of developing cancer, order your copy of my new book, “A Cancer Prevention Guide for the Human Race,” from AmazonBarnes & NobleBooks-A-Million,Vroman’s Bookstore, and other fine bookstores!


On Thanksgiving Day, 2010, A Cancer Prevention Guide for the Human Race was ranked #6 among all cancer-related books on the Amazon.com “Top 100 Bestseller’s List” for Kindle e-books! On Christmas Day, 2010, A Cancer Prevention Guide for the Human Race was the #1 book on the Amazon.comTop 100 New Book Releases in Cancer” list!


Disclaimer:  As always, my advice to readers is to seek the advice of your physician before making any significant changes in medications, diet, or level of physical activity


Dr. Wascher is an oncologic surgeon, professor of surgery, cancer researcher, oncology consultant, and a widely published author


For a different perspective on Dr. Wascher, please click on the following YouTube link:

Texas Blues Jam


I and the staff of Weekly Health Update would again like to take this opportunity to thank the more than 100,000 health-conscious people, from around the world, who visit this premier global health information website every month. (More than 1.2 million health-conscious people visited Weekly Health Update in 2010!) As always, we enjoy receiving your stimulating feedback and questions, and I will continue to try and personally answer as many of your inquiries as I possibly can.


 


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Green Tea and Skin Health

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“A critical weekly review of important new research findings for health-conscious readers”



GREEN TEA AND SKIN HEALTH

 

In our youth-obsessed culture, there are countless creams, lotions, vitamins, herbal remedies, and personal care devices that have been advertised as rejuvenators of aging skin.  Unfortunately, very few of these skin anti-aging remedies are supported by any rigorous clinical or laboratory research data.  Now, a new prospective, randomized, placebo-controlled, double-blinded clinical research study strongly suggests that antioxidant polyphenols from green tea may actually help to protect skin against damage caused by exposure to ultraviolet (UV) light, and may also help to improve overall skin quality.

In this new clinical research study, which appears in the current issue of The Journal of Nutrition, 60 adult female volunteers were randomized into either a control group or an interventional group. The women in the intervention group consumed a beverage fortified with green tea polyphenols (1,402 milligrams of green tea catechins per day), while the women in the control group consumed a beverage that was identical in appearance but which did not contain any green tea polyphenols. Skin protection against UV light damage, skin structure, and skin function were then tested in all of these women at the time they began the study, 6 weeks into the study, and once again 12 weeks into the study.

Skin testing with UV light exposure sufficient to cause redness of normal unprotected skin was performed in both groups of women. (This “erythema response” is a sign of acute UV-induced skin injury.) In the interventional group of women volunteers, skin redness in response to a standard dose of UV light decreased by 16 percent at 6 weeks, and by 25 percent at 12 weeks. Additionally, the elasticity, roughness, scaling, density, and water content of the skin all improved during the course of this study among the women who had been secretly randomized to receive daily green tea polyphenol supplements (when compared to the women in the control group who received the placebo beverage). Daily green tea polyphenol consumption was also shown to increase blood flow and oxygen delivery to the skin, with maximal blood flow improvement occurring about 30 minutes following green tea polyphenol consumption.

In summary, the daily consumption of green tea catechins was shown, in this innovative prospective, randomized, placebo-controlled, double-blinded study, to significantly improve the skin’s injury response to UV light exposure, and also appeared to significantly improve several important clinical aspects of overall skin quality. In addition to promoting healthier and more youthful appearing skin, green tea polyphenols, as I have discussed in previous columns (and in my recent book, A Cancer Prevention Guide for the Human Race), have also been linked to improved cardiovascular health, and may also help to reduce the risk of certain types of cancer.

For a comprehensive guide to living an evidence-based cancer prevention lifestyle, order your copy of my new book, A Cancer Prevention Guide for the Human Race.  For the price of a cheeseburger, fries, and a shake, you can purchase this landmark new book, in both paperback and e-book formats, and begin living an evidence-based cancer prevention lifestyle today!


For a groundbreaking overview of cancer risks, and evidence-based strategies to reduce your risk of developing cancer, order your copy of my new book, A Cancer Prevention Guide for the Human Race,” from Amazon, Barnes & Noble, Books-A-Million,Vroman’s Bookstore, and other fine bookstores!


On Thanksgiving Day, 2010, A Cancer Prevention Guide for the Human Race was ranked #6 among all cancer-related books on the Amazon.com “Top 100 Bestseller’s List” for Kindle e-books! On Christmas Day, 2010, A Cancer Prevention Guide for the Human Race was the #1 book on the Amazon.comTop 100 New Book Releases in Cancer” list!


Disclaimer:  As always, my advice to readers is to seek the advice of your physician before making any significant changes in medications, diet, or level of physical activity


Dr. Wascher is an oncologic surgeon, professor of surgery, cancer researcher, oncology consultant, and a widely published author


For a different perspective on Dr. Wascher, please click on the following YouTube link:

Texas Blues Jam


I and the staff of Weekly Health Update would again like to take this opportunity to thank the more than 100,000 health-conscious people, from around the world, who visit this premier global health information website every month. (More than 1.2 million health-conscious people visited Weekly Health Update in 2010!) As always, we enjoy receiving your stimulating feedback and questions, and I will continue to try and personally answer as many of your inquiries as I possibly can.





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Beer May Prevent Heart and Arterial Disease (Atherosclerosis)

 

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“A critical weekly review of important new research findings for health-conscious readers”


BEER MAY PREVENT HEART AND

ARTERIAL DISEASE (ATHEROSCLEROSIS)

 

Dietary polyphenols, which are potent antioxidants, are thought to have a wide range of potential health benefits, including a reduction in the risk of cardiovascular disease and some forms of cancer.  Polyphenols are found in many plant-based foods that we eat, including that age-old beverage, beer.

A newly published research study, which appears in the current issue of the British Journal of Nutrition, has drawn some very important conclusions about the potential health benefits of alcohol-free beer.

As we age, the inner lining of our arteries often becomes progressively more diseased.  As our arteries age, complex “plaques” can form on the inner surfaces of our arteries (a process known as atherosclerosis), which may then result in a critical narrowing of important arteries, including the arteries that nourish our heart, kidneys, brain, legs and feet, and other important sites in our bodies.  When these atherosclerotic plaques bleed or rupture, the blood supply to our vital organs can then become compromised, resulting in heart attack, kidney failure, stroke, and the potential loss of toes, feet, and legs.

In this interesting laboratory study, mice with a genetic predisposition towards atherosclerosis were fed either alcohol-free lager beer or alcohol-free dark beer for 20 weeks.  (Mice within a third group, the control group, did not receive any alcohol-free beer.)  The results of this study were striking.  The mice that received alcohol-free lager (“light”) beer experienced 44 percent less atherosclerosis within the main artery in their bodies (the aorta), while the mice that consumed the more polyphenol-rich alcohol-free dark beer were noted to have 51 percent less atherosclerosis in their aortas (versus the control group mice).

Additional results from this animal study indicated that the consumption of alcohol-free beer significantly also reduced the presence of substances that cause the lining of arteries (endothelium) to become “sticky,” such that inflammatory white blood cells, muscle cells, and fat cells begin to “stick” to the interior of these arteries, causing arterial atherosclerosis.

While I always caution that the findings of laboratory animal research studies are very often not validated in subsequent human studies, this particular animal study is exciting in that not only was a significant reduction in atherosclerosis observed among the mice that received alcohol-free beer supplements, but also the actual biochemical mechanisms linked to the development of atherosclerosis, in both mice and men (with apologies to Steinbeck…), were also shown to be inhibited by alcohol-free beer supplementation.

The findings of this study raise the possibility that beer polyphenols may be able to significantly reduce the risk of atherosclerosis, particularly in people with an increased predisposition towards premature atherosclerosis and cardiovascular disease.  (I must stress that the frequent consumption of beer, or other beverages that contain alcohol, is associated with a variety of potentially serious health problems, including liver disease, GI tract bleeding, pancreatitis, cancers of the breast and GI tract, and other life-threatening illnesses.  However, fortunately, based upon the results of this laboratory animal study, alcohol-free beer appears to retain the potential health benefits of traditional beer, but without the harmful health effects associated with beer that contains alcohol.)

 

For a complete discussion of the role of dietary polyphenols in cancer prevention, and other important evidence-based approaches to cancer prevention, order your copy of my new book, A Cancer Prevention Guide for the Human Race.  For the price of a cheeseburger, fries, and a shake, you can purchase this landmark new book, in both paperback and e-book formats, and begin living an evidence-based cancer prevention lifestyle today!

 

For a groundbreaking overview of cancer risks, and evidence-based strategies to reduce your risk of developing cancer, order your copy of my new book, A Cancer Prevention Guide for the Human Race,” from Amazon, Barnes & Noble, Books-A-Million, Vroman’s Bookstore, and other fine bookstores!   

 

On Thanksgiving Day, 2010, A Cancer Prevention Guide for the Human Race was ranked #6 among all cancer-related books on the Amazon.com “Top 100 Bestseller’s List” for Kindle e-books!  On Christmas Day, 2010, A Cancer Prevention Guide for the Human Race was the #1 book on the Amazon.com Top 100 New Book Releases in Cancer” list!  

 



Disclaimer: As always, my advice to readers is to seek the advice of your physician before making any significant changes in medications, diet, or level of physical activity



Dr. Wascher is an oncologic surgeon, a professor of surgery, a cancer researcher, an oncology consultant, and a widely published author



For a different perspective on Dr. Wascher, please click on the following YouTube link: 
Texas Blues Jam



I and the staff of Weekly Health Update would again like to take this opportunity to thank the more than 100,000 health-conscious people, from around the world, who visit this premier global health information website every month.  (More than 1.2 million health-conscious people visited Weekly Health Update in 2010!)  As always, we enjoy receiving your stimulating feedback and questions, and I will continue to try and personally answer as many of your inquiries as I possibly can.






 

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Hesperidin in Orange Juice Improves Hypertension and Arterial Function

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Welcome to Weekly Health Update


“A critical weekly review of important new research findings for health-conscious readers”


HESPERIDIN IN ORANGE JUICE IMPROVES

HYPERTENSION AND ARTERIAL FUNCTION

 

Polyphenols are chemical compounds that are found in most of the plant-based foods that we commonly eat.  As I discuss in detail in my new book, A Cancer Prevention Guide for the Human Race, some polyphenolic compounds, such as green tea flavonoids, soy-based isoflavones, quercetin, curcumin, and resveratrol, among other polyphenols, may possess important cancer prevention properties.  There is also abundant research data suggesting that diets rich in certain natural dietary polyphenols may be associated with a decreased risk of cardiovascular disease, as well.

Hesperidin, which is a flavonoid polyphenol, is found in a variety of plant-based foods, including oranges, orange juice, and other citrus fruits.  A newly published prospective, randomized, blinded clinical research study, which appears in the current issue of the American Journal of Clinical Nutrition, offers intriguing evidence that hesperidin may actually decrease the risk of cardiovascular disease in high-risk patients.

In this pilot study, 24 overweight (but otherwise healthy) men, ages 50 to 65 years, were subjected to 4-week intervals in each of three experimental groups.  The first group was assigned to drink 500 ml (17 ounces) of orange juice per day.  The second experimental group drank a “control drink” that appeared similar to orange juice, but which did not contain any actual orange juice.  However, this “sham orange juice” was fortified with hesperidin.  The third group was also assigned to drink the fake orange juice, and to which was added a supplement portrayed (to the study volunteers, and to the research nurses who administered the beverages to these research volunteers) as hesperidin, but which, in fact, was an inert placebo that contained no hesperidin or other polyphenols.

Physical examinations and blood tests were performed before and after the men rotated through each of these three experimental groups.

The findings of this small but high quality clinical research study were quite interesting.  When compared to the control group that consumed the fake orange juice and fake hesperidin supplement, the men in the other two experimental groups experienced a significant reduction in their blood pressure measurements.  Specifically, the diastolic blood pressure was significantly reduced, which suggests that these men experienced an improvement in the elasticity, or compliance, of their arteries, as a direct result of the hesperidin contained in both orange juice and in the non-juice beverage supplemented with hesperidin.  This observation was again confirmed through additional testing that revealed improved vascular compliance associated with hesperidin intake.  Moreover, this significant improvement in arterial compliance was observed only after the ingestion of hesperidin, and disappeared when these same men were retested after undergoing an overnight fast.  (Improved arterial compliance is associated with a reduced risk of cardiovascular disease, including high blood pressure, coronary artery disease, and stroke.)

To summarize the findings of this study, hesperidin, when taken in the form of either orange juice or as a supplement, appeared to significantly improve arterial elasticity, and lower diastolic blood pressure, in middle-aged overweight men.  While this brief study cannot prove that these observed and transient improvements in arterial compliance subsequently reduced the incidence of cardiovascular disease in these high-risk men, there is abundant data from other research studies linking improved arterial compliance with a reduced incidence of cardiovascular disease.  A much larger version of this small pilot study should now be repeated, and the volunteers in this larger study need to be followed for a much longer duration of time, before we can say, with certainty, that hesperidin significantly reduces the risk of cardiovascular disease.  That being said, the findings of this small but well-conducted, and elegant, randomized, controlled, prospective clinical research study are still quite compelling.

   

HAPPY HOLIDAYS TO OUR MANY HEALTH-CONSCIOUS

WEEKLY HEALTH UPDATE” READERS AROUND THE WORLD!

 

PEACE, LOVE, AND GOOD HEALTH TO ALL OF YOU!

 

For a complete discussion of the role of dietary flavonoids and polyphenols in cancer prevention, and other important evidence-based approaches to cancer prevention, order your copy of my new book, A Cancer Prevention Guide for the Human Race, now!  For the price of a cheeseburger, fries, and a shake, you can purchase this landmark new book, in both paperback and e-book formats, and begin living an evidence-based cancer prevention lifestyle today!

 

GIVE  THE  GIFT  OF  HEALTH  THIS  HOLIDAY  SEASON!  For a groundbreaking overview of cancer risks, and evidence-based strategies to reduce your risk of developing cancer, order your copy of my new book, A Cancer Prevention Guide for the Human Race,” from Amazon, Barnes & Noble, Books-A-Million, Vroman’s Bookstore, and other fine bookstores! 

On Thanksgiving Day, A Cancer Prevention Guide for the Human Race was ranked #6 among all cancer-related books on the Amazon.com Top 100 Bestseller’s List for Kindle e-books!  On Christmas Day, 2010, A Cancer Prevention Guide for the Human Race was the #1 book on the Amazon.comTop 100 New Book Releases in Cancer” list!



Disclaimer: As always, my advice to readers is to seek the advice of your physician before making any significant changes in medications, diet, or level of physical activity


Dr. Wascher is an oncologic surgeon, a professor of surgery, a cancer researcher, an oncology consultant, and a widely published author


For a different perspective on Dr. Wascher, please click on the following YouTube link: 

Texas Blues Jam


I and the staff of Weekly Health Update would again like to take this opportunity to thank the more than 100,000 health-conscious people, from around the world, who visit this premier global health information website every month.  (As of 9/16/2010, more than 1,000,000 health-conscious people have logged onto Weekly Health Update so far this year!)  As always, I enjoy receiving your stimulating feedback and questions, and I will continue to try and personally answer as many of your inquiries as I possibly can.



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Concord Grape Juice Improves Memory

January 24, 2010 by  
Filed under dementia

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“A critical weekly review of important new research findings for health-conscious readers”

 

CONCORD GRAPE JUICE IMPROVES MEMORY

 

Polyphenols are plant-based dietary compounds with known antioxidant and anti-inflammatory properties.  These biological properties of polyphenols reduce the ongoing damage to the DNA in our cells that results from the toxic byproducts of metabolism, including free radicals.  Polyphenols have, therefore, been the subject of intense research as potential prevention agents for a variety of human ailments, including cardiovascular disease, dementia, and cancer.  (The evidence-based role of dietary polyphenols in cancer prevention is discussed in great detail in my soon-to-be-published book, “A Cancer Prevention Guide for the Human Race.”)

Foods that are naturally rich in polyphenols include most blue and red berries, grapes (including red wine), pomegranates, walnuts, peanuts, olive oil, green tea, dark chocolate and cocoa, coffee, and beer (as well as other fruits and vegetables). 

Recent animal research has suggested that polyphenols derived from grape seeds can reduce the development of plaques in the brain (at least in mice) that are associated with the development of Alzheimer’s disease.  Now, a newly published prospective, randomized, double-blind clinical research study suggests that Concord grape juice, which is rich in polyphenols, may be able to improve early memory decline in older adults.

In this small study, which has been published in the British Journal of Nutrition, 12 elderly adults with declining memory were divided into two groups.  The “experimental group” received daily Concord grape juice supplements for a period of 12 weeks.  The second group, the “control group,” received placebo supplements that were identical in appearance to Concord grape juice, but which contained no juice.  Neither the 12 patient volunteers nor the research assistants were aware of which patients received grape juice and which patients received the placebo while the study was being conducted.

Standardized, validated tests of memory, and other aspects of cognitive function, were administered to all 12 patient volunteers participating in this study.  These cognitive function tests revealed statistically significant improvements in verbal learning skills among the patients who received 12 weeks of Concord grape juice (when compared to the placebo group).  Although not statistically significant, improvements were also noted in both verbal and spatial recall among the patient volunteers who received the grape juice supplements in this small clinical study with a brief duration of patient follow-up.

While larger studies, with a longer duration of follow-up, will be required to confirm the findings of this small pilot study, the prospective, randomized, placebo-controlled, double-blind nature of this small study does give it considerably more predictive power than the much larger dietary survey-based epidemiological studies that are more commonly used in disease prevention research. 



In view of the extreme devastation and human misery brought about in Haiti by the recent earthquake, Weekly Health Update asks our tens of thousands of caring readers to give generously to established charities that are currently working in that country to assist the injured, the ill, and the homeless there.  There are many such legitimate charities, including the following two:

http://www.redcross.org/

http://www.imcworldwide.org/haiti



Disclaimer: As always, my advice to readers is to seek the advice of your physician before making any significant changes in medications, diet, or level of physical activity


Dr. Wascher is an oncologic surgeon, a professor of surgery, a cancer researcher, an oncology consultant, and a widely published author



For a somewhat lighter perspective on Dr. Wascher, please click on the following YouTube link: 

http://www.youtube.com/watch?v=7-Tdv7XW0qg



 

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