Cantu Guava & Ginger Carrot Nourishing Scalp Treatment Serum 118ml The Guava & Ginger Treatment Serum from Cantu is a leave-in, oil-based solution that soothes dry, itchy scalp. The nourishing blend of guava, ginger, carrot and tea tree oil infuses the scalp with oils and extracts that soothe irritation and promote healthy hair growth. Apply to dry, flaky areas between washes or use as a hot oil treatment for intense hydration. Cantu restores your hair's natural beauty with carefully selected formulas for wavy, curly and frizzy hair. Suitable for all hair types and textures.