A clinical study or trial is a research study conducted under strict medical guidelines to determine the safest and most effective treatments for various health indications and to uncover new ways to improve health.  Clinical studies may compare a new medical approach to a currently available one or to a placebo containing no active ingredients that would affect the health of the participant.  Every study is different and each follows a specific protocol outlining the procedures, who may participate, visit scheduling, medications and dosage requirements. If you don’t qualify for one study for a particular indication, it doesn’t mean you won’t qualify for the next study of the same indication, as each study has its own unique requirements and qualifications.