Tara Onion Remedy SystemTara Onion Remedy System Tara Onion Remedy System is a potent 3 step treatment ideal for thinning hair. It soothes the scalp, boosts follicles, and thickens each hair. The drug free Tara Onion kit contains a sulfate free shampoo, conditioner, and a serum all rich in onion extract and other natural ingredients. Onion contains powerful antibacterial and antioxidant properties, revitalizes hair, stimulates accelerated growth, and maintains scalp health.