Alterna Caviar Volume Shampoo thickens your hair from root to tip. Achieve,thicker, plumper, stronger hair with every use of Caviar Shampoo for thinning hair. This sulphate-free cleanser builds thickness and volume for thinning hair in women. It protects your hair colour and improves the overall appearance of fine, thin hair. A great and really gentle shampoo to use in conjunction with your thinning hair treatment.