The current study was designed to explore the effect of observing four-week, dawn to dusk IF by participants with obesity on gene expression of the anti-inflammatory CD163, oxidative stress, and bioenergetics enzymes (SOD2, Nrf2, and TFAM), as well as metabolic and cellular regulatory genes (SIRT1 and SIRT3). Here, SIRT1 is linked to obesity due to melanocortin 4 receptor deficiency.