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An '''antinutrient''' is defined as "any natural or synthetic compound that interferes with the absorption of a [[nutrient]]. An example is [[phytic acid]], which forms [[insoluble]] complexes with zinc, iron and copper."<ref>''[http://books.google.ca/books?id=XpUjsqD7lFUC&pg=PA47&lpg=PA47&dq=%22antinutrient%22+dictionary&source=web&ots=shoQIfgivG&sig=WespPlxVwolxTj80_najNDZqU-4&hl=fr&sa=X&oi=book_result&resnum=2&ct=result Oxford Dictionary of Biochemistry and Molecular Biology]''. Oxford University Press, 2006. ISBN 0198529171.</ref> |
An '''antinutrient''' is defined as "any natural or synthetic compound that interferes with the absorption of a [[nutrient]]. An example is [[phytic acid]], which forms [[insoluble]] complexes with zinc, iron and copper."<ref>''[http://books.google.ca/books?id=XpUjsqD7lFUC&pg=PA47&lpg=PA47&dq=%22antinutrient%22+dictionary&source=web&ots=shoQIfgivG&sig=WespPlxVwolxTj80_najNDZqU-4&hl=fr&sa=X&oi=book_result&resnum=2&ct=result Oxford Dictionary of Biochemistry and Molecular Biology]''. Oxford University Press, 2006. ISBN 0198529171.</ref> Nutrition studies focus on those antinutrients commonly found on food sources and beverages. |
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"Antinutrients are found at some level in almost all foods for a variety of reasons, however, they are mostly found in grains or food sources that were not in the diet of our paleolithic ancestors (see sources of anti-nutrients at http://scholar.google.com/scholar?num=30&hl=en&lr=&safe=off&q=anti-nutrient&um=1&ie=UTF-8&sa=N&tab=ws)"<ref>http://www.geo-pie.cornell.edu/issues/toxins.html</ref> |
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"Plants are chemical factories. Unlike animals-- having the luxury of teeth and claws and legs to help them get out of a tight spot-- plants spend their lives in one place and have evolved to rely upon elaborate chemical defenses to ward off unwanted predators. For this reason, plants have in their arsenal an amazing array of thousands of chemicals noxious or toxic to bacteria, fungi, insects, herbivores, and yes, even humans. Fortunately for us, this chemical diversity also includes many compounds that are beneficial to humans-vitamins, nutrients, antioxidants, anticarcinogens, and many compounds with medicinal value."<ref>http://fanaticcook.blogspot.com/2006/11/paleolithic-diet-4-antinutrients.html</ref> |
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"'There are components in raw cereal grains which wreak absolute havoc with human health and well-being.' ... Besides phytates, 'these antinutrients include protease inhibitors, alkylrescorcinols, alpha-amylase inhibitors, molecular-mimicking proteins, etc.' |
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He adds that sophisticated processing technologies only partially mitigate the negative effect of grain consumption. |
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He lays out a convincing argument. |
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I have 2 concerns. When we choose not to eat grains, legumes, starchy tubers, and dairy foods, we're left with meat, seafood, fruit, vegetables, nuts, and a few other seeds - all foods promoted in the Paleo Diet."<ref>http://www.precision-fitness.net/meat_toxins.html</ref> |
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"If you eat meat, you are eating the muscle tissue of dead animals. Meat is made of protein, fat, and a small amount of carbohydrates. Unfortunately, when you eat meat, you also are eating a number of other items. In most cases, these animals are fed artificially, and the foods they are fed have been grown using herbicides and pesticides. These environmental contaminants are fat-soluble and become concentrated in the fatty tissue of these animals."<ref>http://paleolithicdiet.wordpress.com/2008/06/22/antinutrients-your-key-to-bad-health/</ref> |
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"We all know that foods contain a variety of nutrients. There is less awareness that many foods contain small amounts of potentially harmful substances. These are toxins, as they have toxic effects. They are normally called “antinutrients” by the scientific community as toxins sounds too alarmist. Antinutrients are very real and for over 100 years research has been done on them- but it is generally only appreciated by a small group of specialized scientists.<ref>http://www.mercola.com/article/carbohydrates/paleolithic_diet.htm</ref> |
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"The high phytate content of whole grain cereals can impair mineral metabolism i.e. iron, calcium, and other anti-nutrients have the potential to interact with the gastrointestinal tract and perhaps the immune system as well. The high lectin content of whole grain cereals can bind enterocytes in the small intestine and cause villous atrophy in addition to changing tight junction characteristics thereby allowing intestinal antigens (both dietary and pathogenic) access to the peripheral circulation."<ref>http://www.nerdheaven.dk/~jevk/paleo_intro.php</ref> |
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"Yes, the diet is varied enough and it is still the diet that humans are adapted to eat. Vegetables and fruit are far superior nutrient sources compared to grains, legumes and potatoes. Also, vegetables and fruit do not contain nearly the same amounts of toxins or anti-nutrients that legumes and whole-grain products may"<ref>"Better Bones, Better Body" By Susan E. Brown, William H. Philpott, Dwight K. Kalita</ref> |
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"When it comes to diet and bone health the rule is simple: Maximize intake of nutrient-dense, bone-building whole foods and minimize intake of substances which limit bone health. In other words, go for nutrients and avoid the antinutrients. |
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This mandate, of course, was much easier for our ancestors to follow than it is for us." |
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== References == |
== References == |
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{{reflist|}} |
{{reflist|}} |
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Revision as of 22:58, 20 December 2008
An antinutrient is defined as "any natural or synthetic compound that interferes with the absorption of a nutrient. An example is phytic acid, which forms insoluble complexes with zinc, iron and copper."[1] Nutrition studies focus on those antinutrients commonly found on food sources and beverages.
"Antinutrients are found at some level in almost all foods for a variety of reasons, however, they are mostly found in grains or food sources that were not in the diet of our paleolithic ancestors (see sources of anti-nutrients at http://scholar.google.com/scholar?num=30&hl=en&lr=&safe=off&q=anti-nutrient&um=1&ie=UTF-8&sa=N&tab=ws)"[2]
"Plants are chemical factories. Unlike animals-- having the luxury of teeth and claws and legs to help them get out of a tight spot-- plants spend their lives in one place and have evolved to rely upon elaborate chemical defenses to ward off unwanted predators. For this reason, plants have in their arsenal an amazing array of thousands of chemicals noxious or toxic to bacteria, fungi, insects, herbivores, and yes, even humans. Fortunately for us, this chemical diversity also includes many compounds that are beneficial to humans-vitamins, nutrients, antioxidants, anticarcinogens, and many compounds with medicinal value."[3]
"'There are components in raw cereal grains which wreak absolute havoc with human health and well-being.' ... Besides phytates, 'these antinutrients include protease inhibitors, alkylrescorcinols, alpha-amylase inhibitors, molecular-mimicking proteins, etc.' He adds that sophisticated processing technologies only partially mitigate the negative effect of grain consumption. He lays out a convincing argument. I have 2 concerns. When we choose not to eat grains, legumes, starchy tubers, and dairy foods, we're left with meat, seafood, fruit, vegetables, nuts, and a few other seeds - all foods promoted in the Paleo Diet."[4]
"If you eat meat, you are eating the muscle tissue of dead animals. Meat is made of protein, fat, and a small amount of carbohydrates. Unfortunately, when you eat meat, you also are eating a number of other items. In most cases, these animals are fed artificially, and the foods they are fed have been grown using herbicides and pesticides. These environmental contaminants are fat-soluble and become concentrated in the fatty tissue of these animals."[5]
"We all know that foods contain a variety of nutrients. There is less awareness that many foods contain small amounts of potentially harmful substances. These are toxins, as they have toxic effects. They are normally called “antinutrients” by the scientific community as toxins sounds too alarmist. Antinutrients are very real and for over 100 years research has been done on them- but it is generally only appreciated by a small group of specialized scientists.[6]
"The high phytate content of whole grain cereals can impair mineral metabolism i.e. iron, calcium, and other anti-nutrients have the potential to interact with the gastrointestinal tract and perhaps the immune system as well. The high lectin content of whole grain cereals can bind enterocytes in the small intestine and cause villous atrophy in addition to changing tight junction characteristics thereby allowing intestinal antigens (both dietary and pathogenic) access to the peripheral circulation."[7]
"Yes, the diet is varied enough and it is still the diet that humans are adapted to eat. Vegetables and fruit are far superior nutrient sources compared to grains, legumes and potatoes. Also, vegetables and fruit do not contain nearly the same amounts of toxins or anti-nutrients that legumes and whole-grain products may"[8]
"When it comes to diet and bone health the rule is simple: Maximize intake of nutrient-dense, bone-building whole foods and minimize intake of substances which limit bone health. In other words, go for nutrients and avoid the antinutrients. This mandate, of course, was much easier for our ancestors to follow than it is for us."
References
- ^ Oxford Dictionary of Biochemistry and Molecular Biology. Oxford University Press, 2006. ISBN 0198529171.
- ^ http://www.geo-pie.cornell.edu/issues/toxins.html
- ^ http://fanaticcook.blogspot.com/2006/11/paleolithic-diet-4-antinutrients.html
- ^ http://www.precision-fitness.net/meat_toxins.html
- ^ http://paleolithicdiet.wordpress.com/2008/06/22/antinutrients-your-key-to-bad-health/
- ^ http://www.mercola.com/article/carbohydrates/paleolithic_diet.htm
- ^ http://www.nerdheaven.dk/~jevk/paleo_intro.php
- ^ "Better Bones, Better Body" By Susan E. Brown, William H. Philpott, Dwight K. Kalita