All of the above...
Good old fashioned cold pressed "Castor Oil" (abt. $4.50 at Whole Foods)
With my busy schedule I needed something very simple. I read on this forum how some of the ladies mixed Castor Oil with their conditioner and also massaged their scalps with it.
My hair thickened up like crazy in just a few weeks.
3x's a week, I (
gently) massage my scalp with a mixture of about 2 tablespoons of Castor oil and a pinch of Cayenne Red Pepper.
I then coat my hair and ends with a mixture of 2 tablespoons of conditioner (Jasons or Nioxin) and a tablespoon of Castor Oil.
Cover with a plastic cap for at least an hour (sometimes overnight).
Wash with Creme of Nature; air dry; apply Castor Oil to end and place hair in a loose bun or the
"Pooh Bear Twist" style.
No heat, no combing or brushing. I've learned to carefully part my hair with my finger tips. It takes practice, but it works.
Only when necessary, I will use a super wide tooth comb and very carefully.