Natural resveratrol is mainly found in the root of Polygonum cuspidatum. The resveratrol content in the fresh root of Polygonum cuspidatum is higher than that in the fresh stem. However, high-content resveratrol can now be obtained through chemical synthesis and biological fermentation.
Resveratrol is a polyphenolic substance and a natural plant antibiotic. There are two geometric isomers: Cis and trans resveratrol powder. Trans resveratrol is more stable and has a higher active ingredient.
It appears as a white crystalline powder and is odorless. It is difficult to dissolve in water, but easily soluble in organic solvents such as ethanol and acetone.
| Item | polygonum cuspidatum extract | |
| Item | Specification(%) | Result(%) |
| Appearance | Dark grey powder | Conforms |
| Trans-Resveratrol % | Trans-Resveratrol≥50% (HPLC) | 50.84% |
| Resource | Polygonum Cuspidatum | Conforms |
| Lost on drying % | ≤5.0% Max | Conforms |
| Emodin | ≤3% ( HPLC ) | 1.83% |
| Mesh size | 100% pass 80 mesh | Conforms |
| Solubility | Good solubility in alcohol | Conforms |
| Heavy Metal | ≤20 ppm | ＜10 ppm |
| Pb | ≤0.2 ppm | ＜0.17 ppm |
| As | ≤1 ppm | ＜1 ppm |
| Cd | ≤1 ppm | ＜1 ppm |
| Hg | ≤1 ppm | ＜1 ppm |
| Ash Content % | ≤5 % | 3.15% |
| Total Plate Count | 1000 CFU/g Max | Complies |
| Yeast & Mold | 100 CFU/g Max | Conplies |
| Salmonella | Negative | Negative |
| E.Coli | Negative | Negative |
| Aflatoxin B1 | ≤5.00ug/Kg | Conforms |
| Solvent residences | ≤0.05% | Conforms |
| Identification | HPLC/UV-VIS/GC | |
| Conclusion | Conforms | |
As a natural polyphenol, resveratrol also plays an excellent functional role in promoting human nutritional health.
Resveratrol is mainly used in dietary supplements. In addition, it also includes newly launched foods and beverages, especially functional beverages.
It has antioxidant, anti-inflammatory and cardiovascular protection properties.
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