A study published in the Nutrition and Cancer Journal reveals that the herb thyme is more than a cooking spice. Scientists tested a methanol extract of Thymus serphyllum—also referred to as wild thyme—on two types of breast cancer cells and found that it was able to kill them in laboratory testing. The testing also found the extract to be safe for healthy normal breast cells. The researchers state that wild thyme may provide the means for a promising natural cancer treatment.