And [1] explains why this is the case. In short: patents. [1] https://slatestarcodex.com/2018/07/10/melatonin-much-more-than-you-wanted-to-know/ https://slates

And [1] explains why this is the case. In short: patents. [1] https://slatestarcodex.com/2018/07/10/melatonin-much-more-than-you-wanted-to-know/ https://slatestarcodex.com/2018/07/10/melatonin-much-more-th...