ADVERTISEMENT If you’ve ever battled insomnia, you’re probably familiar with the usual suspects: stress, caffeine, alcohol, underlying health issues, or side effects from medications, to name a few. But the key to chronic sleeplessness may lie deep in the gut – at least partly, according to a new study in the journal General Psychiatry. About 10 per cent of adults suffer from regular insomnia, and another 20 per cent experience occasional symptoms, which include difficulty falling asleep and