I used both JBCO & regular CO and my hair/scalp didn't notice any difference between the two. I solely purchase regular cold pressed, hexane free CO at a fraction of the cost of JBCO.

Check out this site w/comparison of both CO:
THE NATURAL HAVEN: Clear Castor Oil or Black Castor Oil - What is the Difference?
JULY 2010 FROM STRAIGHT TO KINKY
doing my own thing... the mention of salon's make me
Jamila brand HENNA IS MY NEW LOVE!
CO, Elucene brand moisturizing shampoo/ moisturizing conditioners, AVJ/ACV rinses are in my arsenal of staple products. My hair DOES like silicones... Organix Argan Oil is a keeper.