Reviews for Zoloft to treat Obsessive Compulsive Disorder. Worked very well for intrusive thoughts OCD for 5 months and then when I missed dosages and tried starting back on it again it stopped working. 3 users found this comment helpful.
Quick Answer. Hair dyes can trigger minor to severe allergic reactions in a small percentage of users. They can also cause dry, brittle hair and hair breakage with extended and frequent use. According to the American Cancer Society, the evidence linking personal hair dye use and cancer is limited and conflicting. As of 2014, personal use of semi-permanent and permanent hair dyes is not considered a known risk factor for cancer.
How Hair Lightening Works. Bleach is used to lighten hair. The bleach reacts with the melanin in hair, removing the color in an irreversible chemical reaction. The bleach oxidizes the melanin molecule. The melanin is still present, but the oxidized molecule is colorless. However, bleached hair tends to have a pale yellow tint. The yellow color is the natural color of keratin, the structural protein in hair. Also, bleach reacts more readily with the dark eumelanin pigment than with the phaeomelanin, so some gold or red residual color may remain after lightening. Hydrogen peroxide is one of the most common lightening agents.