This study involves one in-person visit to Vanderbilt University Medical Center for a single blood draw and urine collection. Participants will be compensated for their time.

The purpose of this study is to measure a metabolite called α-aminoadipic acid (2-AAA) in blood. Different amounts of 2-AAA in the body may alter the risk of developing diabetes. We are interested in whether 2-AAA is present at different levels in healthy people.

You may qualify if you:

• Are between the ages of 18-45
• Have a BMI of 18 to <30 kg/m2
• Are omnivorous and do not follow any restricted diet or have food allergies
• Do not currently use tobacco products or have not done so in the past 30 days
• Do not currently use any prescription medications (except hormonal birth control)
• Do not currently use lysine supplements or are willing to temporarily discontinue use
• Do not have any history of cardiovascular disease, renal disease or liver disease
• Do not have diabetes mellitus
• Do not have atrial fibrillation
• Do not have a bleeding disorder or anemia
• Are not pregnant or lactating
• Have not participated in another clinical trial in the past six weeks
• Are able to participate in follow-up studies
• Are able to fast for eight hours

To find out if you are eligible for this project, please copy and paste the following link into your internet browser to complete a screening survey: https://redcap.vanderbilt.edu/surveys/?s=KWD7JTTFJC

A member of the study team will be in touch once your survey is submitted.