Trigonella Foenum-Graecum Seed Extract Good Plant extracts Hydration Trigonella Foenum-Graecum Seed Extract description Latin name for the fenugreek plant. The seeds are used most often, and their fiber content helps thicken and contribute bulk to products. According to studies presetned on the Natural Medicines Comprehensive Database, fenugreek contains compounds known as coumarins, and in pure concentration, these compounds may cause sensitivity when applied to skin.