MENLO PARK, Calif.–(BUSINESS WIRE)–As millions of Americans track sleep and heart rate variability through wearable devices, ProDx Health is addressing the question those devices can’t answer: what’s actually causing the data to change. The Menlo Park-based diagnostic laboratory today announced its hormone testing service is now available nationwide, delivering testosterone, cortisol, and thyroid results in 48 hours – a significant improvement over the 7-10 day turnaround typical of tradition