Loopholes still exist means.....

The text explains that despite efforts for better labeling, loopholes persist. This means that certain product derivatives, like those from GM sources where no modified protein or DNA remains, are not labeled. Therefore, consumers may not be aware of the product's origin or composition. The options provided are not directly supported by the text, but the concept of loopholes implies that existing regulations or labeling practices have ways to be circumvented or are incomplete. Among the given choices, 'getting round laws' is the closest interpretation of 'loopholes still exist' as it suggests finding ways to bypass or circumvent regulations.