1,4-Butanediol diglycidyl ether

There's different sizes of HA molecules.

And their technology, whether it's cold chain technology or just BDDE technology, they've all evolved in the sense that they're not all used in the same capacity now.

But I will say that AHA fillers used to be where everyone started, you know, with a dermal filler.

That was kind of the first thing that they went

There's different sizes of HA molecules.

And their technology, whether it's cold chain technology or just BDDE technology, they've all evolved in the sense that they're not all used in the same capacity now.

But I will say that ACA fillers used to be where everyone started, you know, with a dermal filler.

That was kind of the first thing that they went.

And this is where dermal fillers come in because these use cross-linked HA.

OK, and the sources mention a specific chemical process for this, right? BDDE cross-linking.

Yeah, BDDE.

Yeah.

It's just the binding agent that ties those long chains of sugar molecules together into a dense three-dimensional mesh.