Current Studies


About Us

"Excellence in Research"

Who We Are

       Stephens is a clinical research organization that tests the effectiveness and safety of innovative products for major cosmetic and pharmaceutical companies around the world. It was founded in 1989, as a research alternative to animal testing, and has research sites in Richardson, Texas and Phoenix, Arizona.

       We test products for baby care, acne, anti-aging, dry skin, eczema, psoriasis, cosmetics, moisturizers, sunscreen, hair loss, foot care, and more.

      Stephens focuses on providing high quality and innovative clinical research services. We are committed to ensuring the privacy, safety and well-being of each participant and adhering to the industry standards for Good Clinical Practice.

Thomas J. Stephens, Ph.D.

Founder and President

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        Thomas J. Stephens earned his Ph.D. in Immunobiology from Iowa State University and his M.S. in Bioscience from Southern Illinois University. Prior to starting Stephens & Associates Inc., he was Director of Product Safety and Claims Substantiation Worldwide for Mary Kay Cosmetics and a Divisional Toxicologist at Procter & Gamble Company.

       Dr. Stephens has published more than 80 scientific articles, technical posters, and book chapters in medicine and science. He also served on the Editorial Board for the Journal of Toxicology, and is an active member of the American Academy of Dermatology and the Society of Cosmetic Chemists.

Get To Know Us

Take an inside look at the Stephens facility.