I try to avoid shampoos that contain such harsh ingredients in it like this esp. Sodium Laureth Sulfate, it's said to cause hair-loss as well being claimed to cause cancer.
I was really looking forward to trying this too, but after reading the ingredient label..No thank you. Knowing that possibility doing more harm than good for you hair! You should look the ingredients up, i'm sure the Birchbox team and writers would be enlightened to know & share this info..