Hi Elizabeth. Tertiary Butyl Hrdroquinone (TBHQ) sounds much scarier than it really is. It's a synthetic and highly effective food grade antioxidant. Essentially what that means is that it helps preserve our vegetable oil. The European Food Safety Authority (EFSA), United States Food and Drug Administration (FDA) and Health Canada have all evaluated TBHQ and determined that it is safe to consume at the concentration allowed in foods.