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Description
Melatonin is an OTC hormone supplement that mainly shifts sleep timing through the circadian system

It describes product life cycles, suggests how business strategy changes depending on where on any single S curve a product happens to be, and has implications for innovation and start-up strategy as well

This is the same material that your cell membranes are made of

doi: 10.1016/j.vaccine.2019.07.092 23 HittE
Lascaratos G et al

H., Kang, Y