Fake butter popcorn flavor linked to Alzheimer's (also found in wine, margarine, more)

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It actually goes far beyond the fake stuff they put on popcorn at the movie theaters.

Diacetyl, already linked to lung damage in people who work in microwave popcorn factories, is also used to produce the distinctive buttery flavor and aroma of margarines, snack foods, candy, baked goods, pet foods, and even some chardonnays.

Margarine? Wine? Pet food? Okay this is rather disturbing. How do these fake chemical flavorings get approved before we know they're safe? (Hat tip, JMG)