Grains

[Guest guest]

Article on the benefits of whole grains. Underlining in the article is my emphasis. In different words it gives the CR Support Group adage: Eliminate a whole food group at your own risk - you never know what you'll be missing.

Grains of Truth

By Tallmadge

In the world of nutrition there seems to be no shortage of complexity and confusion. But I've found that simple and straightforward solutions are often strikingly successful. In no area is this more true than the remarkable power of whole grains.

Over the years, countless clients of mine have struggled with various gastrointestinal complaints such as constipation or irritable bowel syndrome. Many have come to me after trying costly medications, usually with little relief.

In most cases, symptoms disappeared once they began increasing their fiber intake by eating adequate amounts of whole-grain foods. Some of my clients even teasingly call these foods their wonder drug.

But while it's true that whole grains are valuable for their fiber content, their benefits are much more vast. Whole grains play a profound role in health. A growing body of research shows whole grains -- wheat, oats, rice, rye and corn, for example, may help keep body weight down and prevent diabetes, heart disease and some cancers.

The importance of whole grains in health came to light in the 19th century, when refining grains became popular -- and its negative consequences were learned. In Asia, chickens were cured of symptoms of a human illness called beriberi, characterized by muscle wasting and nerve degeneration, when they were fed the discarded part of polished white rice. It was later found that the parts discarded during the refining process contain the essential nutrient, thiamin (a B vitamin) necessary to prevent beriberi.

In 1975, researchers Dennis Burkitt and Hugh Trowell published a book of scientific observations comparing the diet of Africans eating their native whole grains versus North Americans and British eating their diet of highly refined carbohydrates. The researchers described for the first time the role that whole, unrefined foods play in reducing coronary heart disease, diabetes and cancer. Since then, numerous other research studies have chronicled the effects of whole grains on human health.

A whole grain has three parts: bran, germ and endosperm. The bran and germ contain fiber, Vitamin E, B vitamins (thiamin, niacin, riboflavin and pantothenic acid) minerals (calcium, magnesium, potassium, phosphorous, sodium, selenium and iron), protein, essential oils, antioxidants and phytochemicals (plant substances that may protect health). The endosperm contains mostly starch with a little protein and very few nutrients. When a grain is refined, turning whole wheat flour into white flour or brown rice into white rice, only the nutrient-poor endosperm is left. The riches found in the bran and germ are lost.

Food manufacturers attempt to make up for the loss in nutrients by enriching refined grains (those found in breads, pasta, rice and cereals, for instance) with some essential nutrients, such as B vitamins and iron.

But overwhelming scientific evidence has found major health differences in people who eat more whole grains compared with people who eat refined grains, proving enrichment doesn't make up for the difference:

• Whole grains are our major source of fiber. The grain's outer layer (the bran) keeps us regular and helps prevent hemorrhoids, diverticulitis, and reduces risk for ulcerative colitis (Crohn's disease).

• Whole-grain intake is strongly correlated with reduced cardiovascular disease. This is partly explained by the soluble fiber in grains (oats, rye and barley have the highest levels), which is associated with cholesterol lowering. But other substances in grains, such as antioxidants like Vitamin E, also play a role.

• People who eat more whole grains also have lower body weights, according to epidemiological research. This is attributed to the fiber, which promotes feelings of fullness in foods that are generally low in calories.

• Many studies have shown a strong link between whole-grain intake and reduced incidence of type II diabetes. This may be partly because the fiber in whole grains slows down stomach emptying, causing a lower rise in blood glucose and insulin. Also, whole grains contain nutrients such as Vitamin E and magnesium, which may help improve insulin sensitivity.

• This research is less consistent, but whole grains may also help prevent cancers, especially of the intestinal tract and maybe even breast cancer. Several theories have been put forth explaining the mechanisms. For one, the fiber speeds intestinal transit, which reduces exposure to potential carcinogens. Also, antioxidants enter the circulation through colon cells, providing long-term antioxidant protection through the entire digestive tract, according to Joanne Slavin, a professor in the department of food science and nutrition at the University of Minnesota in St. . Ninety percent of a grain's antioxidants aren't released until they get to the colon, the last stage of digestion, where they may provide maximum protection against cancer.

Interestingly, grains are still a mystery to researchers. They are so complex and full of a multitude of different compounds, scientists are largely unsure of what components of the grain are responsible for the benefits.

" We're not sure if the benefits are from the fiber or the phytochemicals, " says Simin Liu, assistant professor of medicine and epidemiology at Harvard. " In my opinion, it's the thousands of phytochemicals in whole grains which produce most of the benefits. "

To prove his point, Liu points to a four-year National Cancer Institute-funded study of high-fiber cereals in which wheat bran was added in the processing as opposed to naturally occurring in a whole grain. Researchers were surprised to find the high-bran diet did not prevent colon polyps, often a precursor to cancer.

" The data doesn't support the claim that added bran fiber or fiber supplements make a positive difference in colon cancer, which is why I like to use the term 'whole grain foods' instead of fiber. The data only point to whole foods, " says Liu.

But while whole grains provide this wide array of health benefits, most Americans don't take advantage of them.

" American adults eat six to seven servings of refined grains but only one serving of whole grains a day, with children eating less than one serving -- well below U.S. Dietary Guideline recommendations of at least three servings, " says Slavin.

While science continues its search for the answers, I recommend you switch from refined-grain products to whole-grain products. Instead of white bread or crackers, choose whole wheat, whole rye or whole grain breads and crackers. Instead of white pasta or white rice, choose whole wheat pasta or brown rice or cereals made with whole oats or whole corn. Try unusual grains such as bulgur (cracked whole wheat), whole wheat couscous or exotic grain-like substances such as quinoa and amaranth.

But looking for whole-grain foods in your supermarket can be challenging. Many " whole wheat " or " multi-grain " breads, for instance, are made predominantly of white flour, even though the label may say " wheat flour. " Be sure the first ingredient on the nutrition label of your pasta, cereal, crackers or bread is a " whole " grain such as whole wheat, whole oats or whole rye. Also look for a whole-grain product containing three or four grams of fiber per one ounce (28 grams) or per 80- to 100-calorie serving. That signifies that the grain is likely in its most natural state.

Tallmadge is a Washington nutritionist and author of " Diet Simple " (Lifeline Press, 2004). Send e-mails to her at food@....

Grain Guide

The grain family includes barley, bulgur, corn, millet, oats, rice, rye and wheat. Amaranth, buckwheat, and quinoa belong to a different botanical family. But they all contain protein, B vitamins, minerals and fiber, as well as antioxidants. Though corn, oats, rice, rye and wheat are relatively easy to find and cook, other of these healthful ingredients may require a search and some guidance before cooking:

AMARANTH This tiny seed, often found in health food stores, can be used to make flour or pasta. Add the seeds to your bowl of cereal, rice or stir-fry.

BARLEY This versatile grain makes a great pilaf or risotto; use the cooked leftovers in a salad, stir-fry or tuna salad.

BUCKWHEAT The seeds of the plant are used to make buckwheat flour, the basis of blini. Buckwheat groats are the hulled and crushed kernels of the seed and are usually cooked in a manner similar to rice. When the groats are toasted, they are called kasha. Add buckwheat to soups, stew, meatloafs or hamburgers. Cook buckwheat groats for a hot breakfast cereal.

BULGUR (also BULGHUR) Made from whole-wheat berries that are steamed, partially de-branned, dried and crushed or cracked, bulgur wheat is available in coarse, medium and fine grinds. A staple of the Middle Eastern diet, it is seen in salads such as tabbouleh or stews. It can also be cooked like a rice pilaf.

MILLET Cracked millet can be cooked like couscous; another variation, pearl millet, can be cooked like rice or a hot breakfast cereal. Millet flour is used in roti, an Indian flatbread.

QUINOA Pronounced " KEEN-wah, " this grainlike product is often found in health food stores. The grain, which must be simmered, has a delicious roasted flavor and can be added to vegetable dishes or rice. Quinoa flakes, a hot cereal similar to oatmeal, make a hearty breakfast.

-- Tallmadge

[Guest guest]

Typical mainstream fluff. I see no mention of the anti-nutrients or

high allergenic potential of grains.

However, the article made me realize that I didn't have any valid

reason I couldn't try whole wheat durum flour as opposed to semolina

flour (the refined durum endosperm) for baking bread. Either way,

grains are not a significant source of bio-available nutrition, but

the unabsorbed fiber-nutrient complexes certainly should have healthy

benefits for the intestines. But this doesn't mean any whole food

grain is suddenly acceptable on a CRON diet. Only semolina has been

identified as being low-insulinic so far.

So does anyone know of a cheap, bulk source for whole wheat durum

flour?

Logan

--- In , Francesca Skelton

> Grains of Truth

>

> By Tallmadge

>

> In the world of nutrition there seems to be no shortage of

complexity and

> confusion. But I've found that simple and straightforward solutions

are

> often strikingly successful. In no area is this more true than the

> remarkable power of whole grains.

[Guest guest]

>>>Typical mainstream fluff.

Here is some of that " mainstream fluff " ......

Mortality Risk

In the Iowa Women's Health Study, s et al. found consumption of whole-grain

foods was associated with a 15 percent to 25 percent reduction in death from all

causes, including cardiovascular disease and cancer. Further analyses were

conducted to determine whether the association of whole-grain intake with total

mortality could be attributed to specific dietary constituents of grain. After

adjustment for fiber, vitamin E, folic acid, phytic acid, iron, zinc, magnesium,

and manganese intake from all sources (except supplements), whole grains were

still found to be independently associated with lowered death rates. s,

D.R., Meyer, K.A., Kushi, L.H., Folsom, A.R. Is whole-grain intake associated

with reduced total and cause-specific death rates in older women? The Iowa

Women's Health Study. Am J Public Health. 1999; 89:322-329.

Diabetes Risk

Dr. Nicola McKeown and fellow researchers at Tufts University found that people

who eat three or more servings of whole grains a day, especially from high-fiber

cereals, are less likely to develop insulin resistance and metabolic syndrome,

common precursors of both Type 2 diabetes and cardiovascular disease. Diabetes

Care, February 2004; vol 27: 538-546.

Whole grains also may protect against diabetes. Salmeron et al. examined cereal

fiber intake (high versus low quintile) and risk for non-insulin dependent

diabetes mellitus (NIDDM) in 42,759 men, followed during a six-year period, and

found that cereal fiber protected against diabetes. Salmeron, J., Aserio, A.,

Rimm, E.B., Colditz, G.A., Spiegelman, D., , D.J., Stampfer, M.J., Wing,

A.L., Willett, W.C. Dietary fiber, glycemic load, and risk of NIDDM in men.

Diabetes Care. 1997; 20:545-550.

Salmeron et al. also examined cereal fiber intake and risk for NIDDM in 65,173

U.S. women, aged 40 to 65 years, with a six-year follow-up period. Cereal fiber

intake (highest quintile) was once again associated with a reduced risk for

diabetes. Salmeron, J., Manson, J.E., Stampfer, M.J., Colditz, G.A., Wing, A.L.,

Willett, W.C. Dietary fiber, glycemic load, and risk of non-insulin-dependent

diabetes mellitus in women. JAMA. 1997; 277:472-477.

Heart Disease Risk

Researchers led by Dr. Mark Pereira collected data on 91,058 men and 245,186

women who participated in 10 studies in the US and Europe. After 6-10 years of

followup, the research showed that, for each 10 grams of fiber consumed per day,

there was a 14% reduction in heart disease risk and a 25% reduction in risk of

dying from heart disease. In short, the cereal fiber in whole grains appears to

make heart disease much less likely-and less serious if it does occur. Archives

of Internal Medicine, February 2004; vol 164: 370-376.

Large prospective epidemiologic studies have consistently found a moderately

strong association between whole-grain intake and decreased coronary heart

disease risk. Post-menopausal women (34,492), aged 55 to 69 years and free of

heart disease, were followed in the Iowa Women's Health Study. Whole-grain

intake was determined by seven items in a 127-item food frequency questionnaire,

which was used to divide participants into groups of low and high whole-grain

consumption. Whole-grain intake, even at low levels, was found to protect

against heart disease. Women who ate at least one serving of whole-grain foods

each day had a 30 percent lower incidence of heart disease compared with women

who consumed whole grains only once a week or less. s, D.R., Meyer, K.A.,

Kushi, L.H., Folsom, A.R. Whole-grain intake may reduce the risk of ischemic

heart disease death in postmenopausal women: the Iowa Women's Health Study. Am J

Clin Nutr. 1998; 68:248-257.

The Nurses' Health Study, a large study in which 68,782 healthy U.S. women, aged

37 to 64, were followed for 10 years, presented convincing data that supports

the relationship between increased consumption of whole grains and protection

against heart disease. The women who consumed the highest amounts of whole

grains had the least incidence of heart disease. However, little evidence of an

association between refined-grain intake and risk of heart disease was found.

The lower risk associated with higher whole-grain intake was not fully explained

by its contribution to intakes of dietary fiber, folate, vitamin B6, and vitamin

E. This data supports that protection comes from the combination of components

in grains rather than any isolated component. Liu, S.M., Stampfer, M.J., Hu,

F.B., Giovannucci, E., Rimm, E., Manson, J.E., Hennekens, C.H., Willett, W.C.

Whole-grain consumption and risk of coronary heart disease: results from the

Nurse's Health Study. Am J Clin Nutr. 1999; 70:412-429.

Cancer Risk

At the University of Utah, a team led by Dr. Martha Slattery found that high

intakes of vegetables, fruits and whole grains reduced the risk of rectal cancer

by 28%, 27% and 31% respectively. A high-fiber diet (more than 34 grams of fiber

per day) reduced rectal cancer by an impressive 66%, in this study of over 2000

people. American Journal of Clinical Nutrition, February 2004; vol 79:

2/274-281.

In a meta-analysis of 40 case-control studies of whole-grain intake and 20 types

of cancer, whole grains were found to have a protective effect in a majority of

the cases. s, D.R., Marquart, L., Slavin, J.L., Kushi, L.H. Whole-grain

intake and cancer: An expanded review and meta-analysis. Nutr Cancer. 1998;

30:85-96.

A review of case-control studies conducted, using a common protocol in Northern

Italy between 1983 and 1996, also found that a higher frequency of whole-grain

consumption, primarily as whole-grain bread and whole-grain pasta, was

associated with reduced risk for several types of cancer. Chatenoud, L., Tavani,

A., La Vecchia, C., s, D.R., Negri, E., Levi, F., Franceschi, S.

Whole-grain food intake and cancer risk. Int. J Cancer. 1998; 77:24-28.

Obesity Risk

As part of Nurses' Study, Simin Liu and fellow researchers at the Harvard School

of Public Health followed over 74,000 women from 1984 to 1996, and concluded

that women who consumed more whole grains consistently weighed less than women

who consumed fewer whole grains. American Journal of Clinical Nutrition,

November 2003; vol 78: 5/920-927.