riz et arsenic

Luc a écrit:Apprends à relativiser ou flingue-toi ! (ça ira plus vite)
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Là, c'est de l'ironie, atténuée par un gif.

Yes. There is no doubt about it, arsenic in rice is a problem.
This may pose a health risk to those who eat rice every day in considerable amounts.
This mainly applies to people in Asia or people with Asian-based diets.
Other groups who may eat a lot of rice products include young children and those on a milk-free or gluten-free diet. Rice-based infant formulas, rice crackers, pudding and rice milk sometimes make up a large portion of these diets.
Young children are especially vulnerable because of their small body size. Therefore, feeding them rice cereals every day may not be such a good idea (14, 15).
Of additional concern is brown rice syrup, a rice-derived sweetener that may be high in arsenic. It is often used in baby formulas (16, 44).
Of course, not all rice contains high arsenic levels, but determining the arsenic content of a particular rice product may be difficult (or impossible) without actually measuring it in a lab.
BOTTOM LINE: Arsenic contamination is a serious concern for the millions of people who rely on rice as their staple food. Young children are also at risk if rice-based products make up a large part of their diet.

The arsenic content of rice can be reduced by washing and cooking the rice with clean water that is low in arsenic.
This is effective for both white and brown rice, potentially reducing the arsenic content by up to 57% (45, 46, 47).
However, if the cooking water is high in arsenic, it may have the opposite effect and raise the arsenic content significantly (24, 45, 48).
The following tips should help reduce the arsenic content of your rice:
• Use plenty of water when cooking.
• Wash the rice before cooking. This method may remove 10–28% of the arsenic (45, 47).
• Brown rice contains higher amounts of arsenic than white rice. If you eat large amounts of rice, the white variety may be a better choice (12, 49, 50).
• Choose aromatic rice, such as basmati or jasmine ([Vous devez être inscrit et connecté pour voir ce lien]).
• Choose rice from the Himalayan region, including North India, North Pakistan and Nepal ([Vous devez être inscrit et connecté pour voir ce lien]).
• If possible, avoid rice that is grown during the dry season. The use of arsenic-contaminated water is more common during that time (7, 23).
The last and most important piece of advice concerns your diet as a whole. Make sure to diversify your diet by eating many different foods. Your diet should never be dominated by one type of food.
Not only does this ensure that you are getting all the nutrients you need, it also prevents you from getting too much of one thing.
BOTTOM LINE: You can follow a few simple cooking methods tips to reduce the arsenic content of rice. Also keep in mind that some types of rice, such as basmati and jasmine, are lower in arsenic.

Inorganic arsenic is generally considered more toxic than organic arsenic.

Inorganic arsenic has been recognized as a human poison since ancient times. It’s the type most often used in pesticides and fertilizers.

It’s also found in a variety of foods. Chickens are often fed arsenic-containing drugs to make them grow faster. But one of the most common food sources of inorganic arsenic is… you guessed it: rice.

Should you stop eating it to avoid the health risks from arsenic?

Consumer Reports tested 223 samples of rice products (1) and found significant levels of arsenic in almost all of them, including white, brown, parboiled, jasmine, basmati, and other types of rice.

You can see the full results of the brands they tested and the results here. (1-2)

Arsenic was found in rice whether it was organic or conventional — and from all regions of the world.

We found that rice cereal and rice pasta can have much more inorganic arsenic—a carcinogen—than our 2012 data showed in our last Consumer Report.
After our 2012 report, we got many questions. Two of the most common: “Are there any types of rice that are lower in arsenic?” and “Do other grains, such as quinoa, contain arsenic, too?” We now have the answers.
In addition to analyzing the FDA data on rice products, scientists at our Food Safety and Sustainability Center tested 128 samples of basmati, jasmine, and sushi rice for arsenic. We combined the data with the results of our 2012 tests and FDA data on arsenic in rice for a total of 697 samples of rice. We also looked at the inorganic arsenic levels in 114 samples of non-rice grains. (You can read the details of our testing in the link underneath).

Our latest tests determined that the inorganic arsenic content of rice varies greatly depending on the type of rice and where it was grown. White basmati rice from California, India, and Pakistan, and sushi rice from the U.S. on average has half of the inorganic-arsenic amount of most other types of rice.
Our findings led us to treat those specific rices from those areas differently from other types of rice and rices grown in other regions.
Brown rice has 80 percent more inorganic arsenic on average than white rice of the same type. Arsenic accumulates in the grain’s outer layers, which are removed to make white rice. Brown has more nutrients, though, so you shouldn’t switch entirely to white. Brown basmati from California, India, or Pakistan is the best choice; it has about a third less inorganic arsenic than other brown rices.
Rice that’s grown organically takes up arsenic the same way conventional rice does, so don’t rely on organic to have less arsenic.

The gluten-free grains amaranth, buckwheat, millet, and polenta or grits had negligible levels of inorganic arsenic. Bulgur, barley, and farro, which contain gluten, also have very little arsenic. Quinoa (also gluten-free), had average inorganic arsenic levels comparable to those of other alternative grains. But some samples had quite a bit more. Though they were still much lower than any of the rices, those spikes illustrate the importance of varying the types of grains you eat.

You may be able to cut your exposure to inorganic arsenic in any type of rice by rinsing raw rice thoroughly before cooking, using a ratio of 6 cups water to 1 cup rice, and draining the excess water afterward. That is a traditional method of cooking rice in Asia. The modern technique of cooking rice in water that is entirely absorbed by the grains has been promoted because it allows rice to retain more of its vitamins and other nutrients. But even though you may sacrifice some of rice's nutritional value, research has shown that rinsing and using more water removes about 30 percent of the rice's inorganic arsenic content.

Biggest arsenic sources come from pesticides and poultry food, some sorts of rice crops that adsorb arsenic more selectively (through rice syrup and flour in gluten-free diet).
 
How to cut your arsenic risk
Change the way you cook rice. You may be able to cut your exposure to inorganic arsenic in rice by rinsing raw rice thoroughly before cooking, using a ratio of 6 cups water to 1 cup rice for cooking and draining the excess water afterward. That is a traditional method of cooking rice in Asia. The modern technique of cooking rice in water that is entirely absorbed by the grains has been promoted because it allows rice to retain more of its vitamins and other nutrients. But even though you may sacrifice some of rice's nutritional value, research has shown that rinsing and using more water removes about 30 percent of the rice's inorganic arsenic content.

Eat a varied diet. Some vegetables can accumulate arsenic when grown in contaminated soil. To help, clean vegetables thoroughly, especially potato skins. Some fruit juices such as apple and grape juice are high in arsenic, as our previous tests showed. (…) Like grape juice, wine also can be a source of exposure, according to data collected in the FDA's Total Diet Study, which provides more complete information about arsenic content in a variety of foods. Go to fda.gov and search for "total diet study analytical results."

Experiment with other grains. Vary your grains, especially if you eat more than two or three servings of rice per week. Though not arsenic-free, wheat and oats tend to have lower levels than rice. And quinoa, millet, and amaranth are among other options for those on a gluten-free diet, though they have not been studied as much.
Dartmouth researchers also shows that rice consumption can contribute to increased urinary arsenic levels in children.

Gaffal a écrit:J' avai lu que le magnesium malate pouvait aider à detox l' aluminium
 aurai t' il d' autres mineraux cibles ?

Aluminum is a potentially hazardous compound that is being increasingly linked to many neurological disorders such as Alzheimer’s Disease. The specific action of aluminum in neural tissues isn’t completely known, but there is enough evidence to suggest a causative correlation [6]. Several studies have shown the ability of carboxylic acids such as malic acid, citric acid, and tauric acid to offer aluminum chelating action, potentially viable solutions for reducing overall aluminum toxicity. To understand how this process works, it helps to realize that aluminum and magnesium are both metals. Aluminum is capable of bonding with compounds like citric and malic acid the same way that magnesium is. When you consume foods high in these types of natural acids, research has shown some evidence of lower aluminum presence [7] [8] [9].

+ Ref 10 for humans
Domingo, J., Gómez, M., Llobet, J., & Corbella, J. (1988). Comparative Effects of Several Chelating Agents on the Toxicity, Distribution and Excretion of Aluminium. Human Toxicology, 7(3), 259-262. doi:10.1177/096032718800700305

Gaffal a écrit:ça m' interesse fort cette histoire de silicium
 surtout pour calmer le systeme immunitaire...
en plus benefique pour l' assimilation du magnesium !

Bref vivement que les orties se mettent à pousser
  reste à voir s' il n' y a pas une meilleure formulation pour cette acide silicilique
   

Nestor345 a écrit: Silicium organique sans pub 
Le silicium : produit mythique de la médecine naturelle
Samedi 17 février 2007 • P.r.a.ti.q.u.e.s de santé. Le Journal de la Médecine naturelle. N° 64 Hors série n° 1. Dr Jean-Pierre willems

Le silicium est effectivement un remède « à tout faire » car :
*) Il joue un rôle prépondérant dans le métabolisme général de l’organisme.
Il intervient en effet directement dans le processus de régénération des cellules en rétablissant l'équilibre ionique des cellules endommagées ou affaiblies et en relançant les échanges cellulaires. Il possède en outre la propriété de traverser la peau pour diffuser ensuite dans l’ensemble de l’organisme, ce qui le rend aussi utile en usage externe, qu’en usage interne.
Le silicium organique a toutefois ses domaines privilégiés d’application :
*) Il protège les os et les articulations.
(…)
*) Il protège la peau.
(...)
*) Il protège le muscle cardiaque et le système circulatoire.
(…)
*) Il protège des radicaux libres et de l’oxydation.
(…) *)
Il accélère les processus de cicatrisation.
(…)
*) C’est un anti-inflammatoire puissant. (…)
*) Il renforce les défenses immunitaires de l’organisme.(…)
*) Une quantité impressionnante d’autres propriétés sont répertoriées.
Le silicium favorise la croissance, il améliore la qualité des phanères (ongles et cheveux) et des dents. Il améliore l’état des diabétiques (le pancréas est particulièrement riche en silicium).
Certains chercheurs considèrent enfin que le silicium est un antidote à l’excès d’aluminium.

Gaffal a écrit:J’avais lu que le magnésium malate pouvait aider à détoxifier l’aluminium.
Aurait-il d’autres minéraux-cibles ?

Magnesium protects the brain from the onslaught of toxic minerals like aluminum, cadmium, lead, mercury and nickel. Low levels of brain magnesium allow the toxic metals to enter brain cells, and could be the harbinger of conditions like Alzheimer’s and Parkinson’s
We recommend combining ionized magnesium with choline citrate to enhance magnesium uptake and chaperone its delivery to cells.
Regular magnesium is often not absorbed efficiently, especially in people with compromised digestion and chronic conditions; these are the people who most need the support that magnesium provides. The cellular uptake of magnesium entails an energy-dependent step that is bypassed by the addition of choline.  

Supplementation with magnesium caused a statistically significant decrease in concentrations of lead and cadmium. The above mentioned results indicate a positive influence of magnesium supplementation on the decrease of lead and cadmium hair content in the individuals studied.

Magnesium can alleviate heavy metal stress by decreasing negative electrical potential and thus metal ion activities at the plasma membrane surface (physico-chemical competition), by enhancing activities of enzymes involved in biosynthesis of organic ligands, and by increasing vacuolar sequestration of heavy metals via increasing H -pumping activity at the tonoplast.

According to an [Vous devez être inscrit et connecté pour voir ce lien] reporting results of a 2013 study, “We have shown that drinking up to 1 liter of a silicon-rich mineral water each day for 12 weeks facilitated the removal of aluminum via the urine in both patient and control groups without any concomitant affect upon the urinary excretion of the essential metals, iron and copper.” Similar studies corroborate these findings.  The team said the chelating effect of the silica is more effective when you drink a lot of water (e.g.  a pint or half liter) in one sitting, rather than sipping small amounts throughout the day.
Mineral water brands like Fiji, Spritzer and Volvic all fall into the “silica-rich” category.  As for others, you’ll have to check company websites for an analysis of what’s in the product. Beware of added fluoride and flavorings, as these ingredients either interfere with chelation or deposit other bad stuff into your body.