This is a two-year long study and participants will be asked to complete in-person surveys once a year and short, monthly surveys online. During the first in-person visit, biological samples will be collected. These samples include bloodspot and hair. We will also measure other aspects of your physical health, such as height, weight and blood pressure.
Participants will be paid for each in-person visit and each at-home survey completed. Over the course of the project, you could receive up to $260.