[Yaelle]

Is organic or corn-fed beef likely to be safer (although highly expensive)?

Buying from a farm where no meat products go into the food, and where killing does not involve the stun machine, which is known to push brain parts into the muscles, would be safer.

[pickemuphere]

Is organic or corn-fed beef likely to be safer (although highly expensive)?

Buying from a farm where no meat products go into the food, and where killing does not involve the stun machine, which is known to push brain parts into the muscles, would be safer.

Yes; or, you might stick with grass-fed cattle. You know, grass, that stuff that cows are actually designed to eat? This problem started when "corporate" farms started feeding cows other cows, sheep offal, ground chicken, etc.