What's with all these spamming posts lately? I've only been viewing this website for about three weeks now, but it seems like the last couple days/week or so these people have been popping up like crazy.
If you're going to straighten, it's best to get some thermal protection. You can get these in the form of gels, sprays, and even shampoo and conditioners now. No matter what you do, it'll still be damaging. As for the natural ingredients, sorry I can't help you there.
Wurly, fine, thin, moderately to heavily porous. Mod CG.