The letter said all pregnant and breastfeeding women should take a daily supplement containing 10 micrograms.
Each bottle of Stampede has 140 micrograms, or 7% of the recommended daily allowance, of pyridoxine.
The EPA sets a standard for clean air at no more than 35 micrograms.
The limit, set by the European Union, is 40 micrograms of NO2 per cubic metre of air.
The World Health Organization considers the safe daily level to be 25 micrograms per cubic meter.
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As little as 500 micrograms, the size of the head of a pin, can kill an adult if inhaled or ingested.
As little as 500 micrograms -- an amount the size of the head of a pin -- can kill an adult.
In Bangladesh and West Bengal, the water has anywhere from 300 micrograms per liter to 4, 000 micrograms per liter of arsenic.
Anchor Hill was found to have a reading of 47.7 micrograms per cubic metre, with the government's objective level being 40 micrograms.
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The World Health Organization's standard is set at 10 micrograms per liter.
People aged 65 and over and people who are not exposed to much sun should also take a daily supplement containing 10 micrograms.
The test found that it contained nearly 4, 000 micrograms per litre of carbon tetrachloride - nearly 1, 000 times the World Health Organisation's safe limit.
His breathalyser reading of 44 micrograms of alcohol per 100 millilitres of breath was only narrowly over the legal limit of 35, she added.
Sir Harry said the daily supplement for young children would help them meet the requirement of 7 to 8.5 micrograms of vitamin D per day.
Respiratory health researches have for years suspected a relationship between raised levels of particulate matter (defined as airborne particles smaller than 2.5 micrograms) and cardiac arrest.
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On April 21st the CAA established a new rule, deeming regions thought to have less than 2, 000 micrograms of dust per cubic metre safe for flight.
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But by U.S. standards, Utah's pollution index is off the charts with readings routinely exceeding a scale that tops out at 70 micrograms a cubic meter.
They were part of a group of 15 locations that failed to meet the EU and UK standard of 40 micrograms per cubic metre of nitrogen dioxide.
The Consumer Product Safety Commission (CPSC) calculates that the amount that can be inhaled per day over a lifetime without causing harm is 9 micrograms per meter cubed.
The EPA will decide soon on changing the standards for arsenic by 2000, lowering the acceptable limit of arsenic from 50 micrograms per liter to possibly 10 micrograms per liter.
Both dietary supplements contain 105 micrograms of the trace mineral selenium per daily dose, or about twice the Recommended Daily Allowance, which is 55 micrograms a day for adults, according to the center.
The greater Salt Lake region had up to 130 micrograms of soot per cubic meter on Wednesday, or more than three times the federal clean-air limit, according to the U.S. Environmental Protection Agency.
If the standard were set at 10 micrograms per liter, Nikolaidis said thousands of local water systems and private wells in the country would have to filter the arsenic out to be in compliance.
Birmingham Crown Court heard Dhesi failed a roadside breath test after the crash and was found to have 46 micrograms of alcohol in 100 millilitres of breath - above the legal limit of 35 micrograms.
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European Union guidelines say that earrings are supposed to contain less than 0.05% nickel by weight and should not release more than 0.5 micrograms of the metal per square centimetre of their surface area per week.
After devising experiments to simulate the aging of a mattress, the CSPC calculated that a grand total of 210 micrograms of antinomy particles of a size capable of being inhaled would be released over the course of 10 years.
This incorporates a safety factor of 1, 000 on the lowest observed adverse effect level of antinomy in animals--in other words, the first statistically significant health problem in animals came from inhaling antimony at a level of 9000 micrograms per meter cubed.
Raun and Ensor conclude that federal air quality standards are adequate where ozone levels are concerned (at 75 parts per billion), but that lives would be saved if particulate matter standards were tightened below the current level of 35 micrograms per cubic meter of air.
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The exact cause of spina bifida is unknown, but experts agree women of childbearing age can reduce the risk of their child getting this disease by getting enough folic acid (at least 400 micrograms) from leafy green vegetables, fruits, beans or supplements and vitamin B12 (2.8 micrograms), found in meat and eggs.
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