As I Am Jamaican Black Castor Oil Smoothie This smoothie is lightweight but has strong hold.  As I Am JBCO Smoothie is formulated with Jamaican Black Castor Oil as well as essential Vitamin E & Vitamin C to your hair and scalp How to Use Section hair off and apply to damp or dry hair from roots to tips. Start with a small amount and increase based on thickness of hair. Do not rinse out. Use once to twice a week for best results with the AIA JBCO Leave-In conditioner. Delivers high definition twists and twist-out styles that are smooth, soft and shiny. This frizz-fighting, no flake formula moisturizes and conditions. Say goodbye to residue build-up with this light weight, hydrating formula.