Tampilkan postingan dengan label Myths. Tampilkan semua postingan
Tampilkan postingan dengan label Myths. Tampilkan semua postingan

Jumat, 11 Juni 2010

Seven myths about veggies

Seven myths about veggies



By Lori Bongiorno
More from The Conscious Consumer blog

(Photo: Getty Images)

(Photo: Getty Images)

Is it healthier to eat raw veggies or to cook them? Is fresh broccoli more nutritious than frozen? Is eating iceberg lettuce a waste of time?

You may be surprised by the answers to these seemingly simple questions. In fact, there are several misconceptions when it comes to vegetables. The one universal truth is that most of us could be eating more of them.

As summer approaches, we have more vegetable choices than at any other time of year. Here's a guide to what's fact and what's fiction when it comes to eating your veggies.


Myth: Fresh vegetables are more nutritious than frozen

Fact: Studies show that sometimes you can get more nutrients from frozen veggies, depending on variety and how old the vegetables at your supermarket are. That's because produce starts losing nutrient quality as soon as it's picked.

Frozen vegetables are flash-frozen right after harvest so they are preserved at their peak of freshness when they are most nutritious. Your best bet in terms of taste, nutrition, and the environment is still local in-season produce. When that's not an option frozen can be a better choice (from a nutrient standpoint) than spinachthat takes two weeks to reach your table.


Myth: Cooked veggies are less nutritious than raw

Fact: It depends on the vegetable. "Cooking destroys some nutrients, but it releases others," says Marion Nestle, author of What to Eat. It destroys vitamin C and folic acid, according to Nestle, which is why it's not a great idea to cook oranges.

On the other hand, she says, cooking releases vitamin A and the nutrients in fiber and makes them easier to digest. It's also easier for your body to absorb more lycopene, a cancer-fighting antioxidant, in cooked tomato sauce than from raw tomatoes.

Steam or roast veggies instead of boiling, which leaches out water-soluble vitamins into the cooking water.


Myth: Iceberg lettuce doesn't have any nutrients

Fact: Iceberg lettuce is mostly water so it's hardly loaded with vitamins, but a large head does contain small amounts of protein, fiber, vitamins, and minerals.

You'll get more nutrients from other greens that have less water such as romaine or butterhead lettuce, but contrary to popular belief, iceberg lettuce does have some nutritional value.


Myth: Local vegetables are always cheaper

Fact: It's certainly true that local produce can be good for your budget. This is especially true during the peak of harvest when farmers need to get rid of an abundant crop and there is a lot of competition.

However, there are no guarantees. Local food "is not in any way subsidized so you are paying the real cost of producing the food, and the economies of scale are not there," says Nestle.

Some tips for finding the best deals at your local farmers' market: Shop at the end of the day when farmers are likely to mark down their prices in order to get rid of their inventory. (Go early in the day if selection is more important than price.) Ask your farmer for a volume discount if he or she doesn't already offer one. Take advantage of special deals on bruised or overripe veggies. Prices vary from farmer to farmer so shop around before buying.


Myth: Potatoes make you fat

Fact: Potatoes are virtually fat-free and low in calories. These delicious and inexpensive root vegetables contain a healthy dose of fiber, which can actually make you feel satisfied for longer and help you lose weight.

It's not the potatoes themselves that make you fat. It's how you cook them and what you slather on your spuds that can cause you to pack on the pounds.


Myth: Bagged salads are squeaky clean

Fact: They're not nearly as clean as you may think. Consumer Reports tests found bacteria that are "common indicators of poor sanitation and fecal contamination" in 39 percent of the 208 packages of salad greens it tested. It didn't find E. coli 0157:H7, listeria, or other disease-causing bacteria in its samples.

But it's still a good idea to give greens a good rinse to remove residual soil before eating even if the bag says they're "pre-washed" or "triple-washed."


Myth: Farmer's markets only have organics

Fact: Just because a vegetable (or anything for that matter) is sold at a farmers' market does not mean that it's organic. It still must be certified organic by the U.S. Department of Agriculture for a guarantee that it was grown without synthetic fertilizers and pesticides.

Some farmers will say they are in the process of getting certified, they grow crops without synthetic chemicals but can't afford the certification process, or they only use chemicals when they have no choice and don't use them when it's close to harvest time. It's your call on whether you trust that farmer.


Environmental journalist Lori Bongiorno shares green-living tips and product reviews with Yahoo! Green's users. Send Lori a question or suggestion for potential use in a future column. Her book, Green Greener Greenest: A Practical Guide to Making Eco-smart Choices a Part of Your Life is available on Yahoo! Shopping and Amazon.com.

http://shine.yahoo.com/event/green/seven-myths-about-veggies-1609212/

Rabu, 12 Mei 2010

Four myths about eggs

Four myths about eggs

eggs
(Photo: Getty Images)

Choosing eggs is not nearly as simple as it should be. After all, the average egg weighs about 2 ounces. How many decisions can you possibly have to make for something so small and seemingly simple? Well, let’s see: Brown or white? Large or small? Organic or not?

And those decisions are just the tip of the iceberg. Egg cartons can be stamped with any number of labels, some meaningful, others not so much.

It's not always easy to separate fact from fiction when it comes to eggs. Below are some of the most common misperceptions.

Myth: Brown eggs are different than white.

Fact: The only difference between a brown and white egg is the color of the shell, which is merely a reflection of the breed of the hen. In general, but not always, hens with white feathers and earlobes lay white eggs and those with dark feathers and red earlobes lay brown eggs.

One isn’t healthier, more “natural,” or more eco-friendly than the other. There aren’t any differences innutritional quality, flavor, or cooking characteristics.

Myth: Free-range eggs come from hens that roam freely outdoors.

Fact: The claims are not regulated for eggs, according to Consumer Reports. So there is no guarantee that the hen that laid the eggs ever saw the light of day. Of course, it may have spent time outdoors, but the “free range” label doesn’t mean anything. The following labels are also meaningless when it comes to eggs: “free roaming,” “hormone free,” and “raised without antibiotics.”

Myth: Organic eggs are healthier.

Fact: They certainly can be, but it all depends on the chicken’s diet. Organic eggs come from hens that are fed a 100-percent organic diet. However, what really matters when it comes to nutrition is whether the hens were raised on pasture. Studies, such as those conducted at Penn State University and by Mother Earth News, found that eggs from chickens that ate grass and insects contained higher levels of omega-3 fat, and vitamins E, A, and in some cases D.

If you want eggs from hens that are raised on pasture or spend a lot of time outdoors, then you’ll have to find a farmer you trust at your local farmers’ market.

Myth: Egg substitutes are simply eggs (or egg whites) without the shells.

Fact: Most products have added stabilizers, thickeners, vitamins, carotenes, and, sometimes, spices, according to Marion Nestle, author of What to Eat. She also points out that they cost about twice as much as real eggs. (A pound of egg substitutes weighs slightly less than a dozen small eggs.)

Of course, if you can’t eat egg yolks for health reasons or have no use for them, egg substitutes are a good option, and most products only have a tiny percentage of additives. Just read the labels before buying.

Environmental journalist Lori Bongiorno shares green-living tips and product reviews with Yahoo! Green's users. Send Lori a question or suggestion for potential use in a future column. Her book, Green Greener Greenest: A Practical Guide to Making Eco-smart Choices a Part of Your Life is available on Yahoo! Shopping and Amazon.com.


http://green.yahoo.com/blog/the_conscious_consumer/132/four-myths-about-eggs.html

Minggu, 04 Oktober 2009

10 Breast Cancer Myths Debunked

10 Breast Cancer Myths Debunked

Prevention

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By Marisa Weiss, MD, with Barbara Loecher, Prevention
Intro
Could that sexy underwire bra cause breast cancer? What about that frozen yogurt you just ordered? Or hormone therapy? And how would you know if you had the disease until it was too late anyway? Don't some studies show that examining your breasts and getting mammograms are useless?

Amid all the rumors and controversies surrounding breast cancer these days—what causes it, how to diagnose and treat it—it's hard to know what to think. Or do. One thing we can tell you is that being able to separate fact from fiction could make the difference between life and death.

Myths 1 & 2
Myth 1: Having a risk factor for breast cancer means you'll develop the disease.
No risk factor either alone or in combination with others means you'll definitely get breast cancer. There are various factors that may increase your risk of developing the disease. Some of these appear to increase your risk only slightly. They include smoking, drinking (more than five alcoholic drinks per week year after year), getting your first menstrual period before age 12, continuing to have periods after age 50, and not having your first full-term pregnancy until after age 30. If you have a number of these, the increase in risk can start to be more meaningful.That said, even an inherited genetic abnormality in your family doesn't necessarily mean you're going to get breast cancer. Abnormalities in the so-called breast cancer genes BRCA1 and BRCA2 are very strong risk indicators. But 20 to 60 percent of women with these inherited abnormalities will not develop breast cancer.

Myth 2: If there is no breast cancer in your family, then you're not at risk for the disease.

Every woman is at risk for breast cancer. So are some men! For any individual woman, an inherited abnormality is the strongest risk factor, but only about 10 percent of all cases of breast cancer are due to inherited abnormalities. About 85 percent of women who develop the disease don't have a family history. That's why it's important for all women to get screened regularly.

Myths 3, 4 & 5
Myth 3: Breast cancer is passed only from your mother, not your father.
We now know that breast cancer genes can be inherited from your dad's side of the family. So ask relatives about cases on both sides and in both men and women. About 1,500 cases of male breast cancer are diagnosed in the US each year. In fact, male breast cancer is most closely associated with a BRCA2 abnormality. So if there's a man in the family who's had breast cancer, be sure to tell your doctor.

Myth 4: No matter what your risk factors are, you really don't have to worry about breast cancer until you're through menopause.

The odds of getting the disease do increase as you age. But breast cancer can occur at any age.

That's why all women need to be vigilant. Though experts recommend yearly mammograms starting at age 40, your doctor may suggest that you start even earlier if you have a family history of breast cancer at a young age.

Mammography isn't the ideal screening test for women younger than 40 because it can't "see through" their dense breast tissue. So your doctor may also recommend ultrasound or magnetic resonance imaging (MRI). You may be able to enroll in a study of MRI for breast cancer detection for women at increased risk. To find a clinical trial, go to the searchable database at ClinicalTrials.gov.

Myth 5: Wearing a bra or using antiperspirants and deodorants increases your risk of breast cancer.

These are two Internet rumors that never seem to quit. It's not true that wearing a bra, especially underwire bras, traps toxins by limiting lymph and bloodflow in your breasts, increasing risk. There's also no proof for the claims that antiperspirants and deodorants cause cancer by keeping the body from sweating out the cancer-causing substances that build up in the breasts, or because they contain harmful chemicals that are absorbed through the skin.

Myths 6, 7 & 8
Myth 6: If you have small breasts, you're much less likely to get breast cancer.
Size doesn't matter. Any woman with breasts can get it.

Myth 7: Research shows that using hormone therapy (HT)—even for a short period of time—causes breast cancer.

Many women were understandably concerned when a major study found that HT combining estrogen and progestin increased risks of invasive breast cancer slightly. Another study also showed that combination therapy boosts breast cancer risk somewhat, however, it was able to offer some reassurance: This risk appeared to return to normal 6 months after women stopped using the therapy. This seems to be the case for women who've been on HT for just months and those who've used it for more than 5 years.

One more thing: It's important to note that no studies have found a boost in breast cancer risk for women using estrogen-only therapy. This type of therapy is prescribed solely for women who have had hysterectomies, because estrogen taken alone can cause cancer in the lining of the uterus (endometrial cancer).

Myth 8: Eating high-fat foods and dairy products boosts your risk.

A number of studies have found that women who live in countries where diets tend to be lower in fat have a lower risk of breast cancer. But the majority of studies focusing on women in the US haven't found a solid link between dietary fat consumption and breast cancer risk. Why are these findings contradictory? It may be that women in other countries are at lower risk for other reasons: They exercise more, eat less, weigh less, smoke less, or have a different genetic profile or environmental interaction that makes them less susceptible. One thing we do know: Postmenopausal obesity is a risk factor that does put you at risk for breast and other cancers, so it pays to maintain a healthy weight.

As for dairy products, the study results are mixed. But Harvard's Nurses' Health Study, a large-scale study of 120,000 women, recently found that premenopausal women who ate a lot of dairy products, especially low-fat and fat-free ones, ran a lower risk of breast cancer. The study found no link between dairy product consumption and breast cancer risk in women who are past menopause.

Myths 9 & 10
Myth 9: Mammograms can prevent breast cancer.
A 2003 Harris survey of more than 500 women found that about 30 percent thought mammograms could prevent breast cancer. The truth: While mammograms can detect breast cancer, they can't prevent it.

Myth 10: Some studies actually show mammograms are worthless.

Two studies, including a review study done by Danish scientists, did suggest that getting a regular mammogram didn't lower a woman's risk of dying of breast cancer. But several other studies, including one done by the US Preventive Services Task Force, totally disagree. You can maximize the benefit of mammography screening by seeking out the best facilities and staff in your area. Look for the radiology center that handles the most breast cancer cases in the region. Go to a radiologist who specializes in reading mammograms, and ask, "How many mammograms do you read each year?" More tends to be better. A study published in the Journal of the National Cancer Institute found that radiologists who read more than 300 mammograms a month were more accurate.
Last Updated: 12/04/2006 17:42:11