Trial basics

Everything you want to know before you volunteer

Short, practical guides you can read in a few minutes each.

Clinical trial basics

What a clinical trial actually is

A clinical trial is a carefully planned research study that follows a written protocol to answer specific questions.

Every study follows a protocol that explains who can join, what happens, and for how long.
Studies are reviewed by an independent ethics board before they begin.
Volunteering is always your choice, and you can leave a study at any time.

How research studies work

Most studies move through planning, recruitment, active participation, and follow-up, each with its own purpose.

Trial phases

Phases describe where a study sits in the research journey, from small early studies to large confirmation studies.

Phase 1 studies are small and focus on safety and dosing.
Phase 2 and Phase 3 studies include more volunteers and look at how well an approach works.
Phase 4 studies continue learning after an approach is already available.

Participation expectations

Time commitment, travel, and scheduled visits vary widely. Knowing what to ask helps you decide what fits your life.

Screening basics

Screening is handled by the independent study team to check whether a study is a good fit for you.

Study visit preparation

A little preparation makes visits smoother: bring your questions, confirm logistics, and know who to call.

Healthy volunteer studies: Screening visit, scheduled check-ins, and simple measurements.
Observational studies: Surveys, periodic visits, or activity tracking over weeks or months.
Prevention studies: An initial visit, follow-up contacts, and occasional questionnaires.
Treatment studies: Detailed screening, scheduled visits, and close follow-up by the study team.
Behavioral studies: Sessions, check-ins, and short activities you can often do from home.
Device studies: Device setup, wear periods, and feedback on comfort and usability.