Whole grains are cereal grains Cereals, grains, or cereal grains are grasses cultivated for the edible components of their fruit seeds (botanically, a type of fruit called a caryopsis): the endocarp, germ, and bran. Cereal grains are grown in greater quantities and provide more food energy worldwide than any other type of crop; they are therefore staple crops. In their natural that contain germ The germ of a cereal is the reproductive part that germinates to grow into a plant; it is the embryo of the seed. Along with bran, germ is often a by-product of the milling that produces refined grain products. Cereal grains and their components, such as wheat germ, rice bran, and maize may be used as a source from which vegetable oil is extracted,, endosperm Endosperm is the tissue produced under the seeds of most flowering plants around the time of fertilization. It surrounds the embryo and provides nutrition in the form of starch, though it can also contain oils and protein. This makes endosperm an important source of nutrition in human diet. For example, wheat endosperm is ground into flour for, and bran Bran is the hard outer layer of grain and consists of combined aleurone and pericarp. Along with germ, it is an integral part of whole grains, and is often produced as a by-product of milling in the production of refined grains. When bran is removed from grains, the latter lose a portion of their nutritional value. Bran is present in and may be, in contrast to refined grains Refined grains, in contrast to whole grains, refers to grain products consisting of grains or grain flours that have been significantly modified from their natural composition. The modification process generally involves the mechanical removal of bran and germ, either through grinding or selective sifting. Further refining includes mixing,, which retain only the endosperm. Wholegrains can generally be sprouted Sprouting is the practice of soaking, draining and then rinsing seeds at regular intervals until they germinate, or sprout. This can be a semi-automated or fully automated process when done on a large scale for commercial use while refined grains Refined grains, in contrast to whole grains, refers to grain products consisting of grains or grain flours that have been significantly modified from their natural composition. The modification process generally involves the mechanical removal of bran and germ, either through grinding or selective sifting. Further refining includes mixing, generally will not sprout. Wholemeal products are made from wholegrain flour In the culinary sense, flour is a powder made of cereal grains, other seeds, or roots. It is the main ingredient of bread, which is a staple food for many cultures, making the availability of adequate supplies of flour a major economic and political issue at various times throughout history. Wheat flour is one of the most important foods in.

Common whole grains:

Common whole grain products include:

Common refined-grain products include:

Contents

Identifying whole grain products

Wholegrain products can be identified by the ingredients list. Typically, if the ingredient lists "wholewheat," "wholemeal," or "whole corn" as the first ingredient, the product is a wholegrain food item. On the other hand, terms such as "enriched" and "bromated," among others, could indicate that the food lacks wholegrain. Wholegrains are healthier than their enriched counterparts.[1]

"Wheat flour" (as opposed to "wholegrain wheat flour" or "wholewheat flour") as the first ingredient is not a clear indicator of the product's wholegrain content. If two ingredients are listed as grain products but only the second is listed as wholegrain, the entire product may contain between 1% and 49% whole grain.[1] Many breads are colored brown (often with molasses Molasses is a viscous byproduct of the processing of sugar cane or sugar beets into sugar. The word molasses comes from the Portuguese word melaço, which ultimately comes from mel, the Latin word for "honey". The quality of molasses depends on the maturity of the sugar cane or sugar beet, the amount of sugar extracted, and the method of) and made to look like wholegrain, but are not. In addition, some food manufacturers make foods with whole-grain ingredients, but, because whole-grain ingredients are not the dominant ingredient, they are not wholegrain products. Contrary to popular belief, fiber is not indicative of wholegrains. The amount of fiber varies from grain to grain, and some products may have things like bran, peas, or other foods added to boost the fiber content.[2]

In Canada, it is legal to advertise any food product as "wholewheat" with up to 70% of the germ removed.[3] While the resulting product will contain the benefit of fiber in the nutritional information, it lacks the more recently-discovered health benefits of antioxidants found in the wheat germ The germ of a cereal is the reproductive part that germinates to grow into a plant; it is the embryo of the seed. Along with bran, germ is often a by-product of the milling that produces refined grain products. Cereal grains and their components, such as wheat germ, rice bran, and maize may be used as a source from which vegetable oil is extracted,. Canadian consumers can be assured of wholegrain products by a label stating 100% whole grain wholewheat.

Wholegrains are often more expensive than refined grains because their higher oil content is susceptible to rancidification Rancidification is the chemical decomposition of fats, oils and other lipids. There are three basic types of rancidity. Hydrolytic rancidity occurs when water splits fatty acid chains away from the glycerol backbone in glycerides. Oxidative rancidity occurs when the double bonds of an unsaturated fatty acid react chemically with oxygen. Microbial, complicating processing, storage, and transport.

Similar to the distinction between whole and refined grains is that between whole pulses A pulse is an annual leguminous crop yielding from one to twelve grains or seeds of variable size, shape, and color within a pod. Pulses are used for food and animal feed. The term "pulse", as used by the Food and Agricultural Organization , is reserved for crops harvested solely for the dry grain. This excludes green beans and green and refined dal Dal or Parippu (Nepaliदाल daal Hindi दाल dāl, Bangla ডাল dāl, Kannada ಬೇಳೆ bēḷe, Malayalam പരിപ്പ് parippu, Marathi डाळ ḍāḷ, Tamil பருப்பு paruppu, Telugu పప్పు pappu, dāl, Urdu دال) is a preparation of pulses (dried beans, lentils etc.) which have been stripped of.

From AACC (American Association of Cereal Chemists) definition: "Wholegrains shall consist of the intact, ground, cracked or flaked caryopsis, whose principal anatomical components - the starchy endosperm, germ and bran - are present in the same relative proportions as they exist in the intact caryopsis."

U.S. standards of identity

The following names indicate whole-grain products, in accordance with the federal government:[4][5][6]

Flour, glycemic index and insulin resistance

When searching for wholegrain foods, it is important to note that any products made with flour In the culinary sense, flour is a powder made of cereal grains, other seeds, or roots. It is the main ingredient of bread, which is a staple food for many cultures, making the availability of adequate supplies of flour a major economic and political issue at various times throughout history. Wheat flour is one of the most important foods in can have the same effect on blood sugar The blood sugar concentration or blood glucose level is the amount of glucose present in the blood of a human or animal. Normally, in mammals the body maintains the blood glucose level at a reference range between about 3.6 and 5.8 mM (mmol/L, ie, millimoles/liter). It is tightly regulated as a part of metabolic homeostasis, whether the flour is produced from whole grains or not. For example, wholegrain wheat bread and white bread can have the same glycemic index The glycemic index, glycaemic index, or GI is a measure of the effects of carbohydrates on blood sugar levels.[citation needed] Carbohydrates that break down quickly during digestion and release glucose rapidly into the bloodstream have a high GI; carbohydrates that break down more slowly, releasing glucose more gradually into the bloodstream,. Grinding grains into flour increases the surface area upon which enzymes Enzymes are proteins that catalyze chemical reactions. In enzymatic reactions, the molecules at the beginning of the process are called substrates, and the enzyme converts them into different molecules, called the products. Almost all processes in a biological cell need enzymes to occur at significant rates. Since enzymes are selective for their work to more quickly convert starch Starch or amylum is a carbohydrate consisting of a large number of glucose units joined together by glycosidic bonds. This polysaccharide is produced by all green plants as an energy store. It is the most important carbohydrate in the human diet and is contained in such staple foods as potatoes, wheat, maize , rice, and cassava into glucose Glucose , a simple sugar (monosaccharide), is an important carbohydrate in biology. Cells use it as a source of energy and a metabolic intermediate. Glucose is one of the main products of photosynthesis and starts cellular respiration. Starch and cellulose are polymers derived from the dehydration of glucose. The name "glucose" comes. Keeping grains as close to their original form as possible slows or prevents the digestion of starch, and a slower digestion is responsible for preventing spikes in blood sugar (which over time may lead to insulin resistance Insulin resistance is a physiological condition where the natural hormone, insulin, becomes less effective at lowering blood sugars. The resulting increase in blood glucose may raise levels outside the normal range and cause adverse health effects. Certain cell types such as fat and muscle cells require insulin to absorb glucose. When these cells).[7]

Health and whole grain consumption

In a 2002 study, consumption of whole grains was found to be associated with lower fasting insulin concentrations when compared to those associated with the consumption of refined grains. This effect as well as improved insulin sensitivity was noticeably more pronounced among obese and hyperinsulinemic subjects, suggesting whole grain consumption to be an important component of reducing risk factors for type II diabetes Diabetes mellitus type 2 or type 2 diabetes (formerly called non-insulin-dependent diabetes mellitus , or adult-onset diabetes) is a disorder that is characterized by high blood glucose in the context of insulin resistance and relative insulin deficiency. While it is often initially managed by increasing exercise and dietary modification, when only compared to the consumption of refined grains.[8] Consumption of whole grains has also been consistently linked with a significant decrease in risk factors for cardiovascular disease Heart disease or cardiovascular diseases is the class of diseases that involve the heart or blood vessels . While the term technically refers to any disease that affects the cardiovascular system (as used in MeSH C14), it is usually used to refer to those related to atherosclerosis (arterial disease). These conditions have similar causes,. Regular wholegrain consumption lowers LDL and triglyceride levels, which contributes to an overall 26% reduction in coronary heart disease risk factors. In addition, wholegrain consumption is inversely related to hypertension, diabetes, and obesity when compared to refined grains, all of which are negative indicators in total cardiovascular health.[9]

See also

References

  1. ^ "Whole Grains Council - Intro to Whole Grains". http://www.wholegrainscouncil.org/whole-grains-101. Retrieved 2007-10-10.
  2. ^ "Whole Grains Council - Identifying Whole Grain Products". http://www.wholegrainscouncil.org/whole-grains-101/identifying-whole-grain-products. Retrieved 2008-02-10.
  3. ^ Schwartz, Rosie. "A whole grain of truth". http://www.canada.com/nationalpost/news/bodyandhealth/story.html?id=35d1e36f-9b49-4708-ba4a-e31d6d5f5096. Retrieved 2007-05-01.
  4. ^ "21 CFR 136" (HTML). http://www.cfsan.fda.gov/~lrd/FCF136.html. Retrieved 2008-02-10.
  5. ^ "21 CFR 137" (HTML). http://www.cfsan.fda.gov/~lrd/FCF137.html. Retrieved 2008-02-10.
  6. ^ "21 CFR 139" (HTML). http://www.cfsan.fda.gov/~lrd/FCF139.html. Retrieved 2008-02-10.
  7. ^ "Glycemic Index – From Research to Nutrition Recommendations?" (PDF). http://www.norden.org/pub/velfaerd/livsmedel/uk/TN2005589.pdf. Retrieved 2007-07-09.
  8. ^ [http://www.ajcn.org/cgi/reprint/76/2/390 "Wholegrain intake is favorably associated with metabolic risk factors for type 2 diabetes and cardiovascular disease in the Framingham Offspring Study"]. http://www.ajcn.org/cgi/reprint/76/2/390. Retrieved 2009-03-30.
  9. ^ "Whole Grain Foods and Heart Disease Risk". http://www.jacn.org/cgi/reprint/19/suppl_3/291S. Retrieved 2009-03-29.

External links

Wheat resources
History Domestication · Neolithic Revolution · Tell Abu Hureyra · Triticeae
Types of wheat Common · Durum · Einkorn · Emmer · Kamut · Norin 10 · Red Fife · Spelt · Winter wheat
Agronomy Wheat diseases (List) · Wheat mildew · Wheat breeding
Trade Australian Wheat Board · Canadian Wheat Board · Wheat pool · International Wheat Council · Production statistics · Peak wheat · Protein premium
Parts Straw · Kernel · Germ · Husk · Bran · Gluten
Basic preparations None: Wheatberry · Milling: Farina · Semolina · Middlings · Groats · Flour (Types) · Parboiling: Bulgur
As an ingredient Bread · Flatbread · Cracker · Wheat gluten · Pasta · Couscous · Wheat beer · Wheat germ oil
Associated diseases Gluten sensitivity (Wheat allergy, Coeliac disease, etc.) · Exercise-induced anaphylaxis
Related concepts Plant breeding · Whole grain · Refined grains · Staple food · Bread riot · Wheat pasting
Further information

Categories: Cereals

 

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