The U.S. Department of Agriculture has adopted as final an interim rule that extends the use of synthetic methionine in organic poultry production until Oct. 1, 2012.

The final rule establishes the following maximum levels of synthetic methionine per ton of feed:


  • laying chickens – 4 pounds
  • broiler chickens – 5 pounds
  • turkeys and all other poultry – 6 pounds

More details on the rule can be found in the Federal Register.