PROYOU the amplifier shampoo 350 ml PROYOU the amplifier shampoo 350 ml is a shampoo that is designed to increase the volume of your hair. It is enriched with wheat proteins, which helps to strengthen and thicken the hair strands. The shampoo is also formulated with panthenol, which helps to condition the hair and add shine. It also contains natural extracts such as olive oil, which helps to nourish and protect the hair. It is ideal for those with fine or thinning hair.