An Orris root extract is disclosed. The Orris root extract is obtained via Orris root materials via selective extraction, and is selectively enriched in (A) a phytochemical melanogenesis stimulating agent or (B) a phytochemical melanogenesis inhibiting agent. The phytochemical melanogenesis stimulating agent (A) comprises germanaism B, and the phytochemical melanogenesis inhibiting agent (B) comprises iriflorental and/or iripallidal. A method of preparing the Orris root extract composition is also provided, and includes selectively extracting an Orris root materials to give at least one Orris root extract. A functional composition comprising the Orris root extract is also provided. The functional composition is adapted for administration to a subject via topical application, and demonstrates activity relating to skin pigmentation.