Words are powerful. The mere act of saying something creates a sort of shadow of truth, however unlikely it is.
Mr Putin, for instance, is a master of creating shadows of truth (and then running away and, presumably, giggling).
And as for written-down words, they have even more authority than spoken ones (which is presumably why writers are sometimes called authors). That's why there are rules about the claims you can make in advertisements.
Still, if there's a really good product out there, information about it can still be published.
Here's a piece from the Kaleidoscope catalogue about the fabric of a pair of jeans.
Emana is a polyamide yarn with bio-active minerals incorporated in the polymer matrix which are said to absorb the waves emitted by the human body and send them back in the form of "Far Infrared Rays". The result is a unique formula which is believed to reduce the appearance of cellulite, reduce muscle fatigue and increase skin elasticity, thus delivering smoother younger looking skin.
...actually, even written-down words aren't that powerful, are they?
Word To Use Today: jeans. This word comes from jean, which is the fabric of which jeans are made. Jean has been around since the 1500s and is short for jean fustian, from Gene, Genoa.