A hair regrowth system consisting of sensitization, growth, and maintenance kits for alopecia areata and related alopecia balding conditions. Graduated doses of specific engineered and or extracted haptens are included in a sensitization kit for initiating immune system response in hairless areas. A growth kit containing topical hormones to increase papilla size and vigor and a maintenance kit to sustain immune system response and papilla size and vigor for the long term are included in some embodiments.