[Charles Wysocki of Monell Chemical Senses Center] found 20 volunteers who also could not initially detect androstenone, and after six weeks of sniffing the pheromone for three minutes, three times a day, half of them became sensitive to the molecule. This finding is in some ways intuitive; the olfactory senses of perfumers and sommeliers, after all, become more attuned to perfumes and wine with time.

— Read more about the development of post-Covid-19 smell training in You Recovered From COVID-19. Now Your Coffee Smells Like Sewage. at The Atlantic.