Cortisol is the hormone we seem to hear about more than any other. While typically it's been associated with stress or our body's 'fight or flight' response, it also affects other parts of our body.

For sleep-deprived parents, viral sleep hacks can sound tempting, but which are worth the money and which come with risks?

Which viral sleep hacks are worth the money, and which come with some big risks? Here's what to know.