They enrolled people "in excellent general health" intending to observe Ramadan and did the fasting over Ramadan. I didn't read the whole study but I don't see

They enrolled people "in excellent general health" intending to observe Ramadan and did the fasting over Ramadan. I didn't read the whole study but I don't see the evidence that subjects had a disrupted circadian clock to beign with. It is certainly not a study of circadian disorders and as far as I know there is no evidence that adjusting eating affects sleep, however it makes sense that the timing of eating affects things related to energy and metabolism and that those relate to many of the issues with circadian disruption. I had not heard of proteomics before and don't know how well validated that analysis is or how these results compare to other methods of fasting.