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Cold and flu season always comes around when the weather starts to change. But does cold, wet weather actually make you sick?Not really, experts say. But cooler temperatures and dry winter air can ...
Referring to a common salt of fluoride, sodium fluoride (NaF), the lethal dose for most adult humans is estimated at 5 to 10 g (which is equivalent to 32 to 64 mg elemental fluoride/kg body weight). [ 2 ] [ 3 ] [ 4 ] Ingestion of fluoride can produce gastrointestinal discomfort at doses at least 15 to 20 times lower (0.2–0.3 mg/kg or 10 to 15 ...
The dry air produced by heating systems can irritate your nasal passages and throat, which can in turn cause discomfort, Lizarzaburu adds. Dry air can also make it harder to fight off colds.
There are claims online that fluoride is poisonous, but experts say that's a stretch. Excessive amounts of fluoride can be harmful, but it's rare and typically happens in young children.
Fluoride is classified as a weak base since it only partially associates in solution, but concentrated fluoride is corrosive and can attack the skin. Fluoride is the simplest fluorine anion. In terms of charge and size, the fluoride ion resembles the hydroxide ion. Fluoride ions occur on Earth in several minerals, particularly fluorite, but are ...
Many people do not know that fluoridation is meant to prevent tooth decay, or that natural or bottled water can contain fluoride. As fluoridation does not appear to be an important issue for the general public in the U.S., the debate may reflect an argument between two relatively small lobbies for and against fluoridation. [72]
Colder temperatures, especially in winter months, won’t cause a common cold. But they can weaken your immune system, and colder, drier air can help respiratory viruses thrive.
Soluble fluorides are moderately toxic: 5–10 g sodium fluoride, or 32–64 mg fluoride ions per kilogram of body mass, represents a lethal dose for adults. [273] One-fifth of the lethal dose can cause adverse health effects, [ 274 ] and chronic excess consumption may lead to skeletal fluorosis , which affects millions in Asia and Africa, and ...