Trehalose is a white, odorless plant sugar (polyol) commercially produced through the enzymatic decomposition of maltose, a plant-based starch derived from grains or kudzu root. Plant sugars are powerful humectants that moisturize the skin without side effects. However, unlike most plant sugars, trehalose has unique and unusual properties that make it a sought-after ingredient in high-end anti-aging skincare. It is a resurrection sugar: plants, fungi, bacteria, and some mammals synthesize it to survive freezing, as well as extreme and prolonged periods of dehydration. In the plant kingdom, resurrection plants have the amazing ability to survive under conditions of complete dehydration for months or years until water is restored. Trehalose is a non-reducing sugar and does not easily oxidize. It can boost the anti-aging effects of antioxidants and stabilize proteins and lipids.
 
It acts as an osmoprotectant, meaning it can protect skin membranes and proteins from damage when exposed to unfavorable conditions. Trehalose is classified as a water structure maker. Because of this property, it is considered a natural hydrating agent. One of the causes of aging is insufficient hydration. Dryness can cause wrinkles, fine lines, rough, and flaky skin. Trehalose also possesses physiochemical properties that are beneficial to aging skin.