A blade of grass in a football field (VIDEO)The difference in estrogen level in an 8 oz. steak from a steer that received a steroid implant and a steer that did not receive an implant, is one nanogram. Dan Thomson, DVM, PhD, Beef Cattle Institute, explains that one nanogram is on the scale of one blade of grass in a football field.

In this video, Thomson discusses how to talk to consumers about the safety and level of implants used in beef cattle.