Anti-Dandruff Agents A novel anti-dandruff composition comprising spirofuranone-lactam tetramic acid or derivatives thereof, and optionally at least one biologically derivable meroterpene. The spirofuranone-lactam tetramic acid is preferably a bio-active heterospirocyclic secondary metabolite of Aspergillus, such as pseurotin A. The biologically derivable meroterpene may be selected from fumagillin, fumagillin derivative, chlovalicin, or ovalicin. Use of said agents as anti-dandruff actives in anti-dandruff compositions, particularly shampoos and conditioners is also provided. The active is particularly effective against Malassezia yeasts and Malassezia furfur which may cause dandruff. A method of obtaining the anti-dandruff actives from culturing of Peyronellaea sp. strain RKDO347 is also described.