Recently an expert explained what happens to your brain when you get less than 6 hours of sleep.
Dr Rebecca Robbins, an instructor in medicine at Harvard Medical School said, quote, "One hour can indeed be enough to throw our internal clock out of sync." Which can make the next night's sleep difficult.
But there's more to be aware of then just difficult sleep, Dr Robbins she says toxins released by the brain can potentially lead to serious consequences.
She added: "We discovered that over the course of the day, the brain produces toxins, the accumulation of which is associated with neurocognitive decline such as Alzheimer's disease and dementia.
Not only that, but those who are sleep-deprived are more likely at risk to get sick from colds and the flu.