Here’s some great information on safety of implants in cattle
MEGAN J. WEBB
Farm and Ranch Guide
In the retail case, beef cannot be marketed as “hormone-free” because hormones are produced naturally by plants, animals, and humans for proper regulatory function and survivability. Beef can be marketed as “naturally raised” or “raised without hormones” and must abide by the USDA voluntary claim standards “FSIS Labeling Guideline on Documentation Needed to Substantiate Animal Raising Claims for Label Submissions.” Consumers that prefer to purchase naturally raised or Organic beef should be prepared to pay a premium. Beef produced from implanted cattle can provide consumers a more economical and sustainable product that should be recognized as safe and wholesome.
The Beef Blog 