20-Hydroxyecdysone is actually a In a natural way taking place ecdysteroid hormone which controls the ecdysis (moulting) and metamorphosis of arthropods. It can be thus one of the most typical moulting hormones in insects, crabs, etc. It is also a phytoecdysteroid made by several vegetation, like Cyanotis vaga, Ajuga turkestanica and Rhaponticum ca