How a gene variant affects weight loss and sleep patterns

Researchers want to understand whether a gene called CLOCK 3111T/C affects how your body handles weight loss and influences your sleep habits and eating patterns. This is an observational study, meaning the researchers will collect information about you and a blood sample, but won't be giving you any new medication. They'll follow some overweight or obese participants for 3 months while they try a weight loss diet, to see if the gene variant changes how well the diet works.

Scientists have noticed that some people lose weight more easily than others on the same diet, and some people are naturally night owls while others are morning people. This research aims to figure out whether differences in the CLOCK gene might explain some of these differences, so that doctors could one day customize weight loss and sleep advice based on your genes.