We tested our new repair product on hair that is naturally thinning from age,
on hair thinning from medications and illness, and from loss due to chemotherapy. 
Before her ends were split, dry, & breaking. After repair there were no split ends, it was easier to style, it had more body than before.

All other treatments we tested weighed hair down and it had less body. Most of the treatments made hair look dirty.
The only treatments that looked clean had a low pH which is acidic and closes the cuticle so tight that the hair looks shiny but the unnatural closing of cuticle makes the hair weaker than before and breaks easier than before.