A system for cosmetologists, dermatologists, trichologists, salon professionals and the general public to produce a customized hair or skin care product using a diagnostic device for analyzing hair, scalp, and skin conditions. The diagnostic device communicates the diagnostic data to a self-contained processing apparatus, which has software that can formulate a recipe for the hair or skin care product and generate operating instructions for producing the product based on the recipe. The processing apparatus comprises a housing unit having a control center, a plurality of removable canisters capable of holding ingredients for producing the hair or skin care product, a dispensing system for dispensing the ingredients to a mixing bowl, a mixing device for mixing the ingredients, and preferably a heating element for heating the ingredients in the bowl, wherein the apparatus produces the hair or skin care product according to the operating instructions to provide individualized treatment.
