The Harmonic Egg was created in 2017 by Gail Lynn, a 55-year-old former automotive executive and Hollywood producer from Michigan. It provides a combination of sound, vibration and light therapy – all of which fall under the somewhat alternative umbrella of energy therapy – to calm the nervous system. Despite no evidence for it beyond “thousands of testimonials”, the Harmonic Egg has been quite the success, helping turn Lynn into a self-made millionaire. There are now some 250 Harmonic Eggs across the world in five continents, which are currently sold for $75,000 a pop – when bought as part of the highest “Harmonic Egg tier plan” option – with the price set to increase. Owners of these eggs are known as “guardians” and are trained to facilitate therapy sessions with paying clients.