Health What makes us sleepy during the day? Research links by-products of steroid hormone to excessive daytime sleepiness Jacqueline Mitchell BIMDC Communications August 27, 2025 3 min read A new study sheds light on the biological underpinnings of excessive daytime sleepiness, a persistent and inappropriate urge to fall asleep during the day — during work, at meals, even mid-conversation — that interferes with daily functioning. The findings, published in The Lancet eMedicine, open the d...
