Difeel 99% Natural Premium Hair Oil - Biotin Oil 7.78 oz. SKU: FSSH49-BIO80 UPC: 711716021271 $9.99 Default Title - $9.99 Quantity Add to Cart This product is currently sold out. Please fill in the form below if you'd like to be notified when it becomes available. Safe, natural way to produce significant increase in hair growth. Helps thicken thin, lifeless hair and can help stimulate nail growth. Can be used on all types of hair including color treated, relaxed, and braided.