Up to 50 older adults (age 60+ years) will participate in a two-visit CRC study with blood sampling (40 ml per visit) occurring before and after a breakfast meal. Specifically, there will be four (10 ml) blood draws during each of the visits, with each blood draw timed one hour apart (T1 to T4). The two visits (short- and long-fasting) will be randomly assigned and counterbalanced for the order in which they occur and will occur at least a week apart. During the short-fasting visit, participants will arrive fasting and be given breakfast after the second blood draw (T2). During the long-fasting visit, participants will arrive fasting and be given breakfast after the fourth blood draw (T4). Aside from blood draws, and vitals obtained at the start of each visit, participants will be seated comfortably in a chair in a small room by themselves. They will be checked upon periodically to ensure they are not falling asleep, they are comfortable, etc. They will also be given a small packet of written questionnaires to complete after T1 and after T3 (i.e., after the 1st and 3rd blood draws). Each visit will be between 3.5 and 4 hours.

There will be two in-person visits both will include four blood draws.

$100 total