Frederick the Great wrote:
>>
http://www.bbc.co.uk/news/15318899
> # Ractopamine in feed for animals is responsible for
> # dramatic muscle growth, yet it is not a steroid or
> # hormone, but rather a compound known as a beta agonist.
> # Only a trace amount of ractopamine need be added for a
> # marked increase in protein and decrease in fat
> # accretion in animals, in particular swine. For the last
> # 90 pounds of live weight gain, a mere 18.5 grams of
> # ractopamine added to a ton of feed (20 ppm) will
> # increase protein by 24% and decrease fat by 34%.