Wednesday, September 5, 2007

Health Benefits of Tomatoes

Scientists are suggesting that tomato lovers may be more likely to reduce the risk of serious disease. Lycopene, an anti oxidant which gives tomatoes their lovely rich red color, helps remove free radicals from the body. Free radicals are unstable oxygen molecules and have been implicated in cancer and other serious diseases.

Professor Michael Avirim of the Rambam Medical Center in Haifa, Israel who is testing lycopene in clinical trials says, ' In its natural form, lycopene is an excellent anti oxidant that helps to prevent formation of oxidized LDL, the 'bad' cholesterol in blood, which contributes to the build up of plaque that narrows, stiffens and constricts arteries and can lead to heart attacks. When this natural extract was added to cancer cell cultures, the lycopene inhibited their growth. Lycopene is the most potent nutritional antioxidant found to date.

Another study compared men who had had a heart attack with the same number of healthy men and found that those with high levels of lycopene appeared to reduce their risk of heart diseases by 50%. The study’s coordinator, Lenore Kohlmeier, professor of nutrition and epidemiology at the university of North Carolina, said, 'Based on our findings, and other research, lycopene can be an excellent antioxidant, we recommend that people eat tomato based cooked foods.

Several recent studies have shown that a diet rich in tomatoes and tomato products is strongly linked to a reduced risk of certain cancers. In a six year study of 48,000 male professionals, Dr Edward Giovannucci and colleagues at Harvard Medical School found that consuming tomatoes and tomato based products between five to seven serving a week was associated with a reduced risk of prostate cancer of 21% to 34%.

Another study published in the International Journal of Cancer said that lycopene appears to protect against cancer of the mouth, pharynx, esophagus, stomach, colon and rectum. Researchers at the University of Illinois report that women with the highest lycopene levels had a five fold lower risk of developing precancerous signs of cervical cancer than women with lowest lycopene levels.

The human body does not produce lycopene alone and therefore relies on a consumption of tomatoes and tomato based products for this anti oxidant. Nutritionists and other health professionals have long advocated the cancer preventative benefits of a diet high in fruits and vegetables.

Lycopene: Just The Facts

Research by Dr. Joseph Levy and colleagues from Ben-Gurion University of the Negev, Beer-Sheva, Israel, may have identified the unique mechanism through which lycopene protects against cancer which is by activating cancer-preventive phase II enzymes. Lycopene is an open-chain unsaturated carotenoid that imparts red color to tomatoes. Lycopene is a proven anti-oxidant that may lower the risk of certain diseases including cancer and heart disease. In the body, lycopene is deposited in the liver, lungs, prostate gland, colon and skin. Its concentration in body tissues tends to be higher than all other carotenoids.

Epidemiological studies have shown that high intake of lycopene-containing vegetables is inversely associated with the incidence of certain types of cancer. For example, habitual intake of tomato products has been found to decrease the risk of cancer of the digestive tract among Italians.

In one six-year study by Harvard Medical School and Harvard School of Public Health, the diets of more than 47,000 men were studied. Of 46 fruits and vegetables evaluated, only the tomato products (which contain large quantities of lycopene) showed a measurable relationship to reduce prostate cancer risk. As consumption of tomato products increased, levels of lycopene in the blood increased, and the risk for prostate cancer decreased. The study also showed that the heat processing of tomatoes and tomato products increases Lycopene bioavailability.

Ongoing research suggests that lycopene can reduce the risk of macular degenerative disease, serum lipid oxidation and cancers of the lung, bladder, cervix and skin.

Health Benefits of Bananas

Research has proven that just two bananas provide enough energy for a strenuous, 90-minute workout. No wonder the banana is the number one fruit with the world's leading athletes. But energy isn't the only way a banana can help us keep fit. Bananas can also help us overcome or prevent a substantial number of illnesses and conditions, making it a must to add to our daily diet.

Research published in the January 2005 issue of the International Journal of Cancer suggests that regular consumption of whole fruits and vegetables, especially bananas, is highly protective against kidney cancer. The results of this large population based prospective study (13.4 years) of 61,000 women aged 40-76, show that women eating more than 75 servings of fruits and vegetables per month cut their risk of kidney cancer by 40%. Among the fruits, bananas were found to be especially protective. Women eating bananas four to six times a week cut their risk of kidney cancer by 50% compared to those who did not eat bananas.

A group called MIND, the largest mental health charity in England, did a study amongst people suffering from depression and found that many felt much better after simply eating a banana. This is because bananas contain Tryptophan, a type of protein that the body converts into serotonin, known to make you relax, improve your mood and generally make you feel happier.

Two-hundred students at a Twickenham (Middlesex, UK) school were helped through their exams this year by eating bananas at breakfast, break, and lunch in a bid to boost their brain power. Research has shown that the potassium-packed fruit can assist learning by making pupils more alert.

Bananas have also been recognized for their antacid effects that protect against stomach ulcers and ulcer damage. In one study, a simple mixture of banana and milk significantly suppressed acid secretion. The nutrients in bananas help activate the cells that compose the stomach lining, so they produce a thicker protective mucus barrier against stomach acids. Bananas also contain compounds known as protease inhibitors which help eliminate bacteria in the stomach that are the primary cause of stomach ulcers.

This unique tropical fruit is extremely high in potassium yet low in salt, making it perfect to help with high blood pressure. So much so, the US Food and Drug Administration has just allowed the banana industry to make official claims for the fruit's ability to reduce the risk of blood pressure and stroke.