OMG.. i felt a difference the very first shower. I can't believe i didn't know about this sooner and have lived without it for so long. The minute i stepped in the shower my hair and skin felt softer and no hair loss.. at all!!!! I have very long hair and despite using the best most expensive stuff, I could still run my hand down my hair and have a fist full of hairs. With the vitamin c filter.. i ran my hand down... 1 Hair...ONE!!!! I will never have this filter ever again. I want this on every tap in my house