Jason Pro-Vitamin Thin-to-Thick™ Hair Thickening Conditioner Your hair and scalp are easily damaged by an increasingly hazardous environment. This super revitalising conditioner provides precisely the type of complete nutritional, environmental and UV protection you need. Reinforces and strengthens weak, chemically processed hair, by infusing Amino Acids into the hair cortex. Jason Thin to Thick Conditioner is part of the range of speciality Jason hair care products. Whether you\'re looking for a natural dandruff treatment, hair thickening products or something to balance your scalp, Jason natural hair care has got you covered. Explore the full range of Jason Natural products, including natural deodorant and Sunbrellas sun care, available from Big Green Smile.