My younger sister (17) has been having a thinning hair issue.  She is way to young to be losing her hair the way she is and now I am getting worried.   At first I thought it might be the shampoo she was using so I switched it out on her, but that didnt do anything. 

Has anyone else dealt with this?  everyone else in the family has a full head of hair, thick and healthy.

For long and thick hair you can try aloe vera, it's an effective way to bring back life to dull hair. SInce it's organic you are assured that your hair will not be irritated or be further damaged. All you have to do is use the fresh ones, it emits a gelatinous substance that you can apply to your scalp and let it stay for 5 minutes and then you can shampoo afterwards and rinse thoroughly. I hope that helps.