Vitamin D supplementation could help lessen period pain, according to Dr Karan Rajan. Author of 'This Book May Save Your Life' and host of the 'Dr Karan Explores' podcast, the health expert regularly shares educational content with followers. In the latest instalment of his newsletter, 6 Interesting Things, the doctor explained why vitamin D could help people with primary dysmenorrhea — period pain that isn't caused by any particular health condition. Dr Karan emphasised that vitamin D is not a