Xi an Pincredit Bio-tech Co., Ltd sell "Natural Resveratrol Powder"

This natural resveratrol is a polyphenol extracted from dried Reynoutria japonica (Japanese knotweed/polygonum cuspidatum) root, appearing as a brown (50%) to off-white (98%) powder that dissolves readily in ethanol, DMSO, and acetone but only sparingly in water. Trans-resveratrol is associated with anti-aging, antioxidant, anti-inflammatory, potentially anticancer, and cardiovascular-supportive properties, and is offered in both synthetic and naturally fermented grades (5%-99% by HPLC, formula C14H12O3) for use in dietary supplements or cosmetics, with free samples available on request.