I haven't heard of any shampoo that has collagen let alone trying them. I got this and it makes my shampoo moments feel luxurious. I can't say much about the thickening part as my hair naturally is thick but I can definitely say that hair feels a lot healthier and easier to manage.
~October 06, 2018
Great shampoo
It makes my dry hair super soft and I really hope it can help with my thinning hair in the long term