c. Polygonum multiflorum thunb root
Root of P multiflorum thunb is used in traditional
oriental medicine for its antibacterial and antifungal
effects and also its antiaging properties, which are
associated with cellular antioxidant activity. In animal
models, topical application of the extract thirty minutes
before UV irradiation strongly inhibited oxidative stress,
specifically the destruction of the superoxide dismutase
enzyme.58