The popular culinary herbs oregano and rosemary are packed with healthful compounds, and now lab tests show they could work in much the same way as prescription anti-diabetic medication, scientists report. In their study published in July 2014 in the Journal of Agricultural and Food Chemistry, Elvira Gonzalez de Mejia and colleagues found that the way the herbs are grown makes a difference, and they also identified which compounds contribute the most to this promising trait.