no there's not a biomarker for this and again what do I mean by a biomarker well you know if you're taking a a medication to lower your blood pressure um measuring your blood pressure actually becomes a biomarker for the thing you're taking is am I taking enough or too much um if you're taking a drug that lowers your apob the apob itself serves as the biomarker um we don't have a way outside of a lab um commercially to measure tissue creatine um levels so we do not have a biomarker for this