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Nice! I didn't know the abstract was available.

I guess the question is what is the level of diacetyl in the vapor inhaled? The CDC has set a limit of 25 ppb for short term exposure.

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You don't want to be around any diacetyl at all. If the lab can detect it, it's too much. It's very, very nasty business.

You better stay away from beer then...

Or just avoid inhaling beer? Granted if it is found in beer at all it would seem likely that just slurping foam would put one over a limit of 25 parts per billion?

Actually, I suppose it's entirely possible that it's only dangerous to inhale if it is vaporised, not just encapsulated in drops?

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