Found the protein collagen.

No, sweetie, they all have collagen.

Injectable collagen or, since the '70s, collagen from pigs has been used for injecting into wrinkles.

Yes, but maybe it's the the collagen.

I remember one of the first times we were looking at collagen.

And your entire body, everything your hair, skin, bone, nails everything is made of collagen.

And the only place that collagen changes its structure is in the cornea of your eye.

And the reason for this is that pigs are actually quite close to human beings, so the collagen is as well.

All we are left with is the skeleton, if you will, of the liver, all made up of collagen, a material that's in our bodies, that will not reject.

It has a central space of spongy erectile tissue that fills with fluid in this case blood surrounded by a wall of tissue that's rich in a stiff structural protein called collagen.

So I went ahead, collected wall tissue, prepared it so it was erect, sectioned it, put it on slides and then stuck it under the microscope to have a look, fully expecting to see crossed helices of collagen of some variety.

And I started first with cow Achilles tendon, where we would take the cow Achilles tendon, which is type I collagen, strip it of its antigens by degrading it with an acid and detergent wash and forming it into a regeneration template.