Highly safe cytokine production inhibitors, agents for protecting and promoting liver function, anti-inflammatory agents and immunosuppressants. Brazilian licorice extract and periandrins, which are constituents thereof, have excellent characteristics of showing effects of inhibiting cytokine production and protecting and promoting liver function, an anti-inflammatory effect and an immunosuppressive effect without any harmful side effects. Thus use of Brazilian licorice extract or periandrins as cytokine production inhibitors makes it possible to inhibit inflammations in various diseases such as rheumatoid arthritis. These substances are also usable as agents for protecting and promoting liver function, anti-inflammatory agents and immunosuppressants. Moreover, foods, cosmetics, sweeteners and food materials containing Brazilian licorice extract exert the effects as described above.