Sleep physicians often hear their patients complain that they often feel awake at night but tired in the morning. Here’s how ...

Furthermore, bacterial circadian rhythms may affect the bugs' resistance ... Theoretically, this "complex interplay" might be disturbed by diseases that affect the gut, he told Live Science ...

One of the most significant and well-known circadian rhythms is the sleep-wake cycle ... it can create a disturbance in the sleep-promoting hormone melatonin, meaning it can't properly balance ...