From what you all are saying, I wonder if Henna is such a good idea for my hair, especially in the crown and towards the front. The crown has always been a kind of frizzy straightish, densely packed, coarse but fragile area. It's the part I was hoping would benefit most from the henna's strengthening and smoothing properties.

But if straightening has to come with it. . .I don't know. I've spent the last couple of years trying to coax the curl back into the front, which used to be springy S-Curls before pressing combs and tight ponytails took their toll. I've now finally got it back to at least waves, with the right treatment. i really would not want to lose that progress. And I don't want the crown any "straighter" either.