Kawa Extract Worst Plant extracts No known benefits Kawa Extract at a glance AKA kava-kava extract Ingredient and plant extract derived from Piper methysticum Can be applied topically and ingested Can cause skin sensitivity, redness and itchiness Kawa Extract description Kawa extract (AKA kava-kava extract) is a potentially skin-sensitizing plant extract derived from the roots or stump of the _Piper methysticum_ plant. Kawa extract is also referred to as kava-kava extract, _Piper methysticum_ root extract and Kava extract. For more info see the entry for Kava-kava extract. Related ingredients: Kava-Kava Extract