Artichokes and beans may not be at the top of your list of favorite foods, but when it comes to antioxidants, these veggies earn a coveted place. They are among a growing variety of foods found to contain surprisingly high levels of these disease-fighting compounds, according to a new USDA study, which researchers say is the largest, most comprehensive analysis to date of the antioxidant content of commonly consumed foods. (See food ranking for total antioxidant capacity here)
In addition to confirming the well-publicized high antioxidant ranking of such foods as cranberries and blueberries, the researchers found that Russet potatoes, pecans and even cinnamon are all excellent, although lesser-known, sources of antioxidants, which are thought to fight cancer, heart disease and Alzheimer's. The study appears in the June 9 print edition of the Journal of Agricultural and Food Chemistry, a peer-reviewed publication of the American Chemical Society, the world's largest scientific society.
"The bottom line is the same: eat more fruits and veggies," says Ronald L. Prior, Ph.D., a chemist and nutritionist with the USDA's Arkansas Children's Nutrition Center in Little Rock, Ark., and lead author of the study. "This study confirms that those foods are full of benefits, particularly those with higher levels of antioxidants. Nuts and spices are also good sources."
The new study is more complete and accurate (thanks to updated technology) than previous USDA antioxidant data and includes more foods than the previous study, the researchers say. They analyzed antioxidant levels in over 100 different foods, including fruits and vegetables. In addition, the new study includes data on spices and nuts for the first time.
Among the fruits, vegetables and nuts analyzed, each food was measured for antioxidant concentration as well as antioxidant capacity per serving size. Cranberries, blueberries, and blackberries ranked highest among the fruits studied. Beans, artichokes and Russet potatoes were tops among the vegetables. Pecans, walnuts and hazelnuts ranked highest in the nut category.
Although spices are generally consumed in small amounts, many are high in antioxidants. On the basis of antioxidant concentration, ground cloves, ground cinnamon and oregano were the highest among the spices studied.
Prior says that the data should prove useful for consumers seeking to include more antioxidants in their diet. But he cautions that total antioxidant capacity of the foods does not necessarily reflect their potential health benefit, which depends on how they are absorbed and utilized in the body. Researchers are still trying to better understand this process, he adds.
Currently, there are no government guidelines for consumers on how many antioxidants to consume and what kind of antioxidants to consume in their daily diet, as is the case with vitamins and minerals. A major barrier to such guidelines is a lack of consensus among nutrition researchers on uniform antioxidant measurements. Scientists will soon attempt to develop such a consensus at the First International Congress on Antioxidant Methods, held June 16-18 at the Caribe Royale Hotel and Conference Center in Orlando, Fla., with the ultimate goal of developing better nutritional data for consumers. ACS is the principal sponsor of the meeting. http://hdlighthouse.org
What Are Free Radicals?
Free radicals create a destructive process in our cells, causing the molecules within the cells to become unstable. They may even be a big player in the formation of cancerous cells by a “chain-reaction” effect, causing other cells to become damaged. Because of the inherent instability of free-radicals, they try to attack other healthy cells to get stable themselves. This then causes the once-healthy cells to react in the same way, attacking others in an never-ending attempt for cellular stability.
In layman’s terms, free-radicals are bullies that start pushing everybody around, and encourage nice cells to become bullies as well. Just like most conflicts, the results are “free radical waste products” made up of our broken, injured and deformed cells. If our cells are weak, it is natural that our organs, tissues and skin of the body will likewise become weakened.
As you can imagine, oxidative damage plays a huge role in many of our modern-day diseases, such as muscle and tissue degeneration, heart disease, diabetes, cancer, as well as many other health problems. You are exposed to free radicals as a normal bi-product of regular bodily processes, like breaking down the food we eat, taking toxic medicines, as well as through exposure to pollutants. In addition, over-exposure to the sun (sunburn) and smoking can also increase your body’s need to oxidize and create free-radicals. Antioxidants stop this cellular chain reaction of oxidation by neutralizing the free radicals. www.globalhealingcenter.com