Oyin Handmade Greg Juice Nourishing Herbal Leave-In Hair Tonic - 8.4 ounces. This oil-free, nourishing herbal leave-in blends vegetable moisturizers and herbal essences to feed hair and scalp like a salad! Its light, citrus-herbal scent comes only from plant extracts, and when we 1st developed it for our cousin Greg, he told us he was sniffing his hair for a week! each of Oyin's Juices softens loose hair to ease detangling, and a quick spritz helps refresh thirsty locks, twists, or braids. Humectants help hair draw moisture from the air. Great refresher for "2nd day" hair.