... 3.Restrict control in pesticide/solvent residue 4.Polygonum cuspidatum Resveratrol 50%, 90%, 98%, 99%. Usage: Direct Antioxidant Activity, Estrogenic and ... life: 2 years when properly stored. Contents supply:5%, 10%, 20%, 50%, 90%, 98%, 99%. Botanical Source: Polygonum cuspidatum Sieb. et ...