Additional Study Information: The overall goal of this project is to determine whether the timing of your meals influences health. We are currently looking for healthy, non-smoking, men and women to participate in this study. You must regularly sleep at least 7-9 hours/night and regularly eat close to wake time. In addition, you must be willing to come to Columbia University Irving Medical Center once a week for two 6-week periods and undergo laboratory testing for 2 consecutive days, twice in each period. Compensation up to $1,675 will be provided. Email cd3003@cumc.columbia.edu and lrn2116@cumc.columbia.edu for more information and to see if you may be eligible.