by Philippa Martyr, The Conversation Vibration devices have been used to treat everything from ‘hysteria’ to hair loss. So Marie Kondo’s tuning forks and crystals are nothing new. Credit: www.shutterstock.com You might remember how Gwyneth Paltrow’s health and well-being website Goop was selling “medical” products with no proven measurable health benefits. Decluttering expert Marie Kondo may be going down...