The federal government has become serious about virginity — at least when it comes to olive oil.

Propelled by complaints about slippery food purveyors selling low-end product as high-end goods, or olive oils being doctored with cheaper canola, safflower or peanut oils, the U.S. Department of Agriculture this fall will roll out new standards to help ensure that consumers buying “100% extra virgin” olive oil get what they pay for.