After hours of research, I have found Cyprus wood to be the least invasive and long lasting for your raised garden bed. If you are concerned about good health and preventing leakage into the roots of your veggie plants - DO NOT USE TREATED WOOD. Regardless of the disclaimers by the large home improvement stores, there is some leakage.
Sure Cyprus cost a little more but isn't your long term health worth it??
You can find Cyprus in the upscale wood selection of most large home improvement centers. You will not find it with the general building lumber supplies.
Cyprus will also deter normal wood insects and it is more attractive.