International Research Services, Inc. (IRSI) is a privately held clinical research company founded in 1977 by Stephen Schwartz, President and CEO. IRSI serves the cosmetic and pharmaceutical industries. Specializing in dermatological safety and efficacy testing, IRSI is a leader in biophysical instrumental analysis of the effects of test products on human skin condition. Additionally, IRSI has phase I-IV Rx and OTC trial experience in numerous other clinical indications including acid indigestion, diabetes, weight loss, constipation, common cold/cough, smoking cessation, pediatric safety testing, and odor threshold tolerance. With our partner, BIOalternatives IRSI is the only US company that can offer both in vivo and in vitro efficacy programs. These factors combine to provide valuable depth of experience to our clients.