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Prostaglandins are one of the body’s messengers that regulate various activities that keep us functioning effectively. They pop up all over the place, but one that’s particularly interesting to a lot of people is that there are prostaglandins that control the rate of hair growth.
Etidronic acid, also known as HEDP, is a type of phosphonate compound that acts as a chelating agent. In plain English, this means it’s very good at grabbing hold of metal ions—like calcium, iron, and copper—and stopping them from interfering with the rest of the ingredients in a product. This is useful in personal care because even tiny traces of metals can spoil the appearance, texture, or shelf life of things like creams, shampoos, and soaps. Etidronic acid helps keep these products stable and looking fresh for longer.