Studies Recruiting Participants

Are you interested in learning about your vitamin D status?

Researchers in the O'Brien Lab are studying vitamin D absorption in women of productive age, seeking to understand population differences in vitamin D absorption and status.

Eligibility

Healthy, non-pregnant, non-lactating females, age 20-39-year-old, self-identified Black/White ancestry, BMI 18.5-24.9 OR ≥ 30 kg/m2

Activity and incentives

In this study you will receive your vitamin D status, breakfast, lunch, and a $250 gift card upon completing the study.

Time commitment

Approximately 4 hours

Location

Martha Van Rensselaer Hall, Cornell University, Ithaca, New York 

Led by

Kimberly O'Brien, Ph.D., and Eva Pressman, M.D.

Information and participation

Review and complete the eligibility screening survey or contact the research group at d4health [at] cornell.edu (d4health[at]cornell[dot]edu) or 607-254-5376. 

Curious about your gut microbiome and how a plant-based diet influences it? 

Researchers in the O'Brien Lab are studying dietary iron and the gut microbiome to understand the difference in gut bacterial profile and iron absorption among vegetarians and non-vegetarians.

Eligibility

Healthy males and females (non-pregnant, non-lactating), age 18-40 years, BMI 18-27 kg/m2, following plant-based diets for > 1 year, non-smoker.

Activity and incentives

In this study, you will receive an anemia screening, free lunch, a nutrition report on your diet and a $60 gift card upon completion.

Time commitment

Approximately 2 hours 

Location

Martha Van Rensselaer Hall, Cornell University, Ithaca, New York

Led by

Kimberly O’Brien, Ph.D.

Information and participation

Review and complete the eligibility screening survey or contact the research group at femicrobiome [at] cornell.edu (femicrobiome[at]cornell[dot]edu) or 607-254-5376.