Redken Color Extend Shampoo Review

I am fast approaching age 60 years and I had noticed that my hair color was fading faster .  I just thought it was my hairdresser was using but found out that it's my age!!!  She recommended I use Redken Color Extend and so I purchased a bottle even though it was considerable more expensive than I have paid in the past.  I wash my hair twice a week and was so surprised just after a couple of washed how much better my hair felt.  It was shinier, not so frizzy and just felt  more healthier.  I thought maybe it's just me who's noticing the difference but was surprised when I recieved comments from work colleagues and some of them have now tried the product for themselves.  I used to have my color redone every month but after using the Redken Color Extend for almost 6 months I find that I only need to have it done every 2 months.  Initally I thought it was an expensive product but no more ...I have saved my not having to have my hair colored so often!!!  The bottle lasts me 6 months approximately which is far longer than any other shampoo I used previously.