If you're struggling to get a good night's sleep, it could be down to your cortisol levels, according to one medical expert who has shared the ten key signs to look out for Source link : https://www.dailystar.co.uk/news/latest-news/doctor-explains-how-poor-sleep-33825700 Author : [email protected] (Sophie Buchan, Jordan Coussins, Harry Thompson) Publish date : 2024-10-04 21:00:18 Copyright for syndicated content belongs to the linked Source.