Friday, October 29, 2010

Thimerosal and Light Tuna

A full dose of flu vaccine that uses thimerosal as a preservative contains 25 millionths of a gram of ethylmercury or 25mcg or 25ug.   That's the amount you find in flu vaccine that comes in ten dose vials.  Vaxigrip (approved for use in Canada) has much less thimerosal in each dose from a 10 dose vial because they've shortened the time from first dose to last dose allowed from the usual 30 days down to 7 days.  See my blog entry.

20mcg is the usual amount of methylmercury found in a can of  'light' tuna. There are difference between methylmercury and ethylmercury, but the similarity in the amounts of a can of light tuna fish, which Canada, doesn't restrict in the diets of pregnant women and a once a year flu shot, helps put the amount of thimerosal in flu vaccine in perspective.

And for those who believe that injection versus eating matters, here's a surprise.  If you were to accidentally or deliberately swallow the mercury from an old thermometer, without inhaling it, you would be OK.  Because almost all the mercury goes straight through your body.  But almost all the methylmercury from food you eat does reach the bloodstream.  Eventually it will be excreted, but that's also true of the ethylmercury in thimerosal.

Scripter, who comments at Huffington-Post  has put together a nice list of resources on the can of tuna versus flu vaccine issue.  Here it is.


Scr1pter   11 hours ago (7:29 AM)

0 comments:

Post a Comment