David Zava PhD

Dr.Zava has devoted his 40-year professional career to exploring the role of hormones in aging and disease. After completing his Ph.D. in biochemistry at the University of Tennessee in 1974, Dr. Zava spent much of his time doing basic research on hormones and breast cancer in Texas, Switzerland, California, and Oregon. In 1998, he established ZRT Laboratory, a CLIA-certified laboratory that is a frontrunner in the innovative development of test methods to identify hormonal imbalances that can lead to debilitating symptoms, diminished quality of life, and increased risk for cancers and many of the diseases of aging, such as diabetes, cardiovascular disease, and senile dementia.

ZRT Laboratory was one of the first laboratories to develop and commercialize noninvasive (saliva and dried urine) and semi-invasive (dried blood spots) methods for testing hormones as an alternative to conventional serum testing. These home collection methods pioneered by ZRT have proven to be far more convenient for the patient and the health care provider and are proving to be extremely valuable for research studies, especially where conventional testing of serum or liquid urine are prohibitively expensive and logistically impossible. Using these unique methods of body fluid collection, ZRT is actively engaged in hormone research studies with Universities, Government (NIH, CDC) and Military agencies, private physicians, and Professional Sports teams.