Wednesday, December 8, 2010
Latest Thoughts.
Wednesday, November 10, 2010
Healthy and Unhealthy Carbs
Healthy carbs (sometimes known as good carbs) include whole grains, beans, fruits, and vegetables. Healthy carbs are digested slowly, helping you feel full longer and keeping blood sugar and insulin levels stable.
Unhealthy carbs (or bad carbs) are foods such as white flour, refined sugar and white rice that have been stripped of all bran, fiber and nutrients. Unhealthy carbs digest quickly and cause spikes in blood sugar levels and energy.
Meat Poultry Nutrition
Are organically produced foods more nutritious?
Foods labeled "organic" must meet the standards set by the U.S. Department of Agriculture's National Organic Program. These standards address what methods farmers use to raise animals and grow crops labeled as "organic." Farms, processing plants and companies must be inspected and certified by a government-approved entity before food products can be labeled "organic." Organic food is produced without using most conventional pesticides, fertilizers, bioengineering or ionizing radiation. However, animal manures are approved as fertilizers, so that raw foods must be thoroughly washed before consumption.
USDA makes no claims that organic foods are more nutritious than conventionally-grown foods; they are produced using different methods. For example, organic meat, poultry, eggs and dairy products come from animals that are given no antibiotics or growth hormones.
Numerous studies have examined the issue of whether organic foods are higher in nutrients than conventional foods. One recent study reviewed the scientific literature and found little difference between organic and conventional foods in terms of concentration of most vitamins, minerals and trace elements. There were some trends toward higher ascorbic acid (vitamin C) levels in leafy green vegetables and potatoes and some variations in the amounts and types of protein found in vegetables and cereal crops. However, the authors concluded that there is not enough evidence available to evaluate nutrient levels compare between conventional and organic foods. The authors, like many nutrition experts, noted that the key to improving health is a well-balanced diet from any source.
References/More Information:
- http://www.ams.usda.gov/nop/Consumers/brochure.html
- http://www.ams.usda.gov/nop/FactSheets/FactSheetsHome.html
- Magkos, F, Arvaniti, F and Zampelas A. Organic food: nutritious food or food for thought? A review of the evidence. Int J Food Sci Nutr. 2003 Sep;54(5): 357-71.
What types of additives are used in meat and poultry products?
Fresh meats and poultry contain no additives, unless noted on the label. All additives used in preparing (e.g marinating, seasoning, etc.) or processing foods must appear on the product's ingredient list.
The Food and Drug Administration (FDA) defines a "food additive" as any substance used to provide a technical effect in foods. All food additives used in meat and poultry products are rigorously evaluated and monitored for safety by both the Food Safety and Inspection Service of the U.S. Department of Agriculture (USDA) and the FDA. Many additives are considered to be "generally recognized as safe" or GRAS, and are considered to have a long, safe history of use in foods or have been proven safe by scientific studies. Spices, salt and sugar are examples of GRAS ingredients.
Many additives come from plant sources such as pineapple plants (bromelin), fig trees (ficin), seaweed (carrageenan), and papaya trees (papain).
Food additives serve many important purposes in food such as improving flavor and appeal, easing food preparation and processing, and extending freshness and safety. Here are just a few examples of additives and their functions:
- Bromelin and ficin are tenderizers that improve flavor and appeal by softening the texture of meat and poultry.
- Sodium caseinate is a binder that improves texture in foods like hot dogs.
- Gelatin and modified food starch are thickeners like are used in products such as luncheon meats to help retain moisture.
- Sodium nitrite is used to cure and provide the unique taste and color of cured meats like ham, bacon and hot dogs. Nitrite has been shown to block the growth of the deadly botulism-causing pathogen Clostridium botulinum, inhibit growth of Listeria monocytogenes, and extend shelf life of meats.
- BHT (butylated hydroxytoluene) and BHA (butylated hydroxyanisole) are antioxidants that slow down rancidity and protect nutrients like vitamin A from breaking down.
- Sodium erythrobate (made from sugar) is used to preserve the color of cured meats.
References/More Information:
Thursday, October 14, 2010
12 Worst Additives
The list of the 12 most dangerous additives to red flag—until we know more—includes the preservative sodium nitrite, used to preserve, color, and flavor meat products. Sodium nitrite is commonly added to bacon, ham, hot dogs, luncheon meats, smoked fish, and corned beef to stabilize the red color and add flavor. The preservative prevents growth of bacteria, but studies have linked eating it to various types of cancer. "This would be at the top of my list of additives to cut from my diet," says Christine Gerbstadt, M.D., M.P.H., R.D., L.D.N., a spokesperson for the American Dietetic Association. "Under certain high-temperature cooking conditions such as grilling, it transforms into a reactive compound that has been shown to promote cancer."
3. Propyl gallate
Propyl gallate is another preservative to avoid. It's used to prevent fats and oils from spoiling and is often used in conjunction with BHA and BHT. This additive is sometimes found in meat products, chicken soup base, and chewing gum. Propyl gallate has not been proven to cause cancer, but studies done on animals have suggested that it could be linked to cancer, so it is an additive to be concerned about. "It's important to read the label," says Gerbstadt. "You really have to carry a cheat sheet around in the supermarket. I try to buy as few foods as possible containing preservatives."
4. Monosodium glutamate
Monosodium glutamate is an amino acid used as a flavor enhancer in soups, salad dressings, chips, frozen entrees, and restaurant food. It is commonly associated with Asian foods and flavorings. MSG can cause headaches and nausea in some people, and animal studies link it to damaging nerve cells in the brains of infant mice. Gerbstadt recommends replacing MSG with a small amount of salt when possible. "Why bother using MSG when you can live without it?" she says. "MSG can cause migraine-like headaches and create other adverse affects for certain people. It is a flavor enhancer, but you’d be better off putting in a few grains of salt."
5. Trans fats
Trans fat makes it onto our dirty dozen list because eating too much of it leads to heart disease. "Trans fats are proven to cause heart disease, and make conditions perfect for stroke, heart attack, kidney failure, and limb loss due to vascular disease," says Gerbstadt. "It would be wonderful if they could be banned." Manufacturers have modified product ingredients lists to reduce the amount of trans fats, and are required to label trans fats amounts, but restaurant food, especially fast food chains, still serve foods laden with trans fats. Experts recommend we consume no more than two grams of trans fat per day, an amount easily accounted for if you eat meat and dairy.
Aspartame
Aspartame, also known by the brand names Nutrasweet and Equal, is an additive found in so-called diet foods such as low-calorie desserts, gelatins, drink mixes and soft drinks. It also comes in individual packages used in place of sugar as a sweetener. The safety of aspartame, a combination of two amino acids and methanol, has been the focus of hundreds of scientific studies. Conclusions by the U.S. Food and Drug Administration, the World Health Organization, the ADA, and the Food and Agriculture Organization indicated that the additive is safe. Conversely, the Center for Science in the Public Interest gave it their lowest ranking in a review of food additives, quoting animal studies in 1970 and in 2007, which suggest that there is a link between aspartame and cancer. Gerbstadt, spokesperson from the ADA—an organization that supports the general safety of aspartame—says that the additive might be unhealthy for some people—especially those with the disease phenylketonuria, an enzyme disorder—because it contains phenalalanine. "Some people may be sensitive to it, and it's easy to avoid," she says.
7. Acesulfame-K
This is a relatively new artificial sweetener, approved by the U.S. Food and Drug Administration in 1998 for use in soft drinks. It is also found in baked goods, chewing gum, and gelatin desserts. Acesulfame-K—the "K" is the chemistry symbol for potassium—is considered 200 times sweeter than sugar. While Gerbstadt isn't specifically concerned about this sweetener when used in moderation, there is a general concern that testing on this product has been scant. Some studies showed the additive may cause cancer in rats, but the substance makes top 12 lists of additives to avoid because further study is needed to conclude whether or not acesulfame-K is harmful.
8. Food colorings: Blue 1, 2; Red 3; Green 3; and Yellow 6
You may think that all dangerous artificial food colorings were banned by the FDA long ago, but there are five still on the market that are linked with cancer in animal testing. "Always opt for the product without the color, if you have a choice," says Gerbstadt. "I'm not saying to avoid all coloring. Many are made from natural sources. But some specific dye colors do promote tumor formation, in the right combination and conditions." Blue 1 and 2, found in beverages, candy, baked goods and pet food, are considered low risk but have been linked to cancer in mice. Red 3, used to dye cherries, fruit cocktail, candy, and baked goods, has been shown to cause thyroid tumors in rats. Green 3, added to candy and beverages, though rarely used, has been linked to bladder cancer. Studies have linked the widely used yellow 6—added to beverages, sausage, gelatin, baked goods, and candy—to tumors of the adrenal gland and kidney.
9. Olestra
Olestra, a synthetic fat known as the brand name Olean and found in some brands of potato chips, prevents fat from getting absorbed in your digestive system. This often leads to severe diarrhea, abdominal cramps, and gas. "If you eat fat when taking Olestra, the fat is going to go right through you," says Gerbstadt. More significantly, though, Olestra inhibits healthy vitamin absorption from fat-soluble carotenoids that are found in fruits and vegetables and thought to reduce the risk of cancer and heart disease. "It blocks fat absorption, but it also blocks vitamin absorption," says Gerbstadt.
10. Potassium bromate
Potassium bromate is rare, but still legal in the U.S., and used as an additive to increase volume in white flour, breads, and rolls. Most bromate rapidly breaks down to an innocuous form, but it is known to cause cancer in animals—and even small amounts in bread can create a risk for humans. California requires a cancer warning on the product label if potassium bromate is an ingredient.
11. White sugar
Some foods, such as fruits and carrots, naturally contain sugar, but watch out for foods with added sugars, such as baked goods, cereals, crackers, even sauces and many other processed foods. Gerbstadt includes white sugar on the list of 12 because although it is non-toxic, large amounts are unsafe for our health and promote bad nutrition. "Simple sugars shouldn't take up more than about 10 percent of the total calories you consume daily," says Gerbstadt. Yet most Americans already are eating way over that amount, consuming 20, 30, or 40 percent of their calories from simple sugars, she says. Too much sugar not only leads to problems with weight control, tooth decay and blood sugar levels in diabetics; it also replaces good nutrition. "In addition to providing unnecessary calories, your body needs nutrients to metabolize sugar, so it robs your body of valuable vitamins and minerals," says Gerbstadt.
12. Sodium chloride
A dash of sodium chloride, more commonly known as salt, can certainly bring flavor to your meal. But salt is another hidden food additive that can lead to health issues. "Small amounts of salt are needed by the body and are beneficial in preserving food," says Gerbstadt. "Excessive amounts of salt can become dangerous for your health, affecting cardiovascular function, leading to high blood pressure, heart attack, stroke, and kidney failure."