I too have lost hair and have had a great, great deal of thinning since using WEN THE ORIGINAL. I started using it in April 2013 and by July, I was shocked to see the start of the thinning.
I too liked the results in the beginning, followed the directions to a "T", yet still clumps came out and thinning is simply awful. My hairdresser noticed it too. Yes, regular hair loss is common in all, but NOT like this. My hairdresser advised a clarifying shampoo, and a thickening conditioner three times a week.
It's mid August, and hair feels better and less is falling out. YES, THERE IS SOMETHING WRONG WITH THE WEN product!
I use my left over WEN to shave my legs....THAT hair can fall out and thin all it wants!
Review about: Wen Conditioner.
Monetary Loss: $200.