Hi LoricaLady
You cannot deplete CoQ10 levels with CoQ10 supplements. However, if you are taking statins they will naturally prevent your body from producing CoQ10. You might try to change to a better product or up your dose considerably.
One of the leading CoQ10 manufacturers, Pharma Nord, faithfully uses non-GMO soy and have been doing so in their original formula. Their product has actually been the brand used in most clinical trials worldwide. Check out results from Q-Symbio, KiSel-10 and the Gulf War study.