Approximately one in three Americans reports experiencing overwhelming drowsiness during the day -- a condition known as excessive daytime sleepiness (EDS). EDS is linked to an increased risk of serious conditions such as cardiovascular disease, obesity, and diabetes. A new study led by investigators from Mass General Brigham and Beth Israel Deaconess Medical Center identifies several molecules in the blood, known as metabolites, that are linked to EDS. Findings suggest that risk of the condition may be influenced by both internal body processes, such as hormone levels, and external factors such as diet. Results are published in Lancet eBioMedicine.
  "Our study suggests diet and genetics may play an important role in EDS," said lead author Tariq Faquih, PhD, a postdoctoral fellow in the Division of Sleep and Circadian Disorders at Brigham and Women's Hospital, a founding member of the Mass General Brigham healthcare system. "As we learn what's happening biologically, we are beginning to understand how and why EDS occurs, the early signs that someone might have it, and what we can do to help patients."
  Researchers collected data on 877 metabolites, naturally occurring molecules in the body influenced by diet and hormones. The team used blood samples from 6,000 participants in the Hispanic Community Health Study/Study of Latinos. The team also used data from a questionnaire that assesses how often a person dozes off during the day in various scenarios. The team replicated the findings in The Multi-Ethnic Study of Atherosclerosis (MESA) study and studies in the UK and Finland.
Know more:  https://www.sciencedaily.com/releases/2025/09/250908175442.htm