Anti-yellow shampoo

My hairdresser recommended using anti-yellow shampoo, or the so-called silver shampoo to combat the yellow tones in my highlighted hair. It has a rather strong chemical smell, though it is not entirely unpleasant. It surely is very strong, I have been using it almost 2 months, and I think the yellow strands are gone now. So, if you are blond and you would like to get rid the yellowness in your hair, I would recommend this product, I got this in Slovakia for 7 EUR.