A premium resveratrol ingredient primarily supplied as trans-resveratrol from Japanese knotweed ReserveNature® is a premium resveratrol ingredient used in dietary supplement formulations. It is based on trans-resveratrol, a natural polyphenolic compound classified as a stilbenoid. Resveratrol is produced by various plants in response to stress and is found naturally in the skin of grapes, berries (including blueberries and raspberries), peanuts, and especially in Polygonum cuspidatum (Japanese knotweed). ReserveNature® is recognised within the supplements industry as a high-purity source of resveratrol that is specified to contain ≥99.0% trans-resveratrol, with negligible levels of related impurities such as emodin (a common stilbene contaminant). Resveratrol is a natural stilbenoid polyphenol widely studied for its biochemical properties. It exists in cis and trans isomeric forms, with the trans form being the predominant and more stable form used in dietary supplements. ReserveNature® is specified to contain ≥99.0% trans-resveratrol. The extract is characterised using chromatographic methods such as HPLC (High-Performance Liquid Chromatography) to confirm identity and quantify resveratrol content. Analytical quality markers These analytical parameters support consistency and compositional clarity. ReserveNature® is assessed against defined identity and purity criteria. Resveratrol is identified by chromatographic retention time and UV spectral characteristics that match authentic trans-resveratrol reference standards. HPLC or equivalent analytical methods confirm the percentage of trans-resveratrol, meeting or exceeding the ≥99.0% specification. Analytical profiles demonstrate minimal levels of related stilbenes, isomers, and non-target compounds. Absence of unexpected contaminants is confirmed. Resveratrol is a small polyphenolic molecule that functions in plants as a phytoalexin — a compound produced in response to environmental stressors. As a botanical polyphenol, it has been extensively studied in laboratory, animal, and human research contexts. A large body of research has examined resveratrol in various human clinical settings, although studies vary widely in design, dose, and outcomes. The overall evidence base remains heterogeneous, with variation in population, dosage, and outcome measures. Human clinical studies have generally reported resveratrol to be well tolerated at commonly used intake levels. Mild, transient gastrointestinal effects have been reported at higher intakes in some studies. Based on the current state of research, resveratrol has been investigated in relation to: Resveratrol is commonly formulated in daily amounts ranging from 50 mg to 500 mg, depending on product design and regulatory considerations. ReserveNature® is a premium resveratrol ingredient specified to contain ≥99.0% trans-resveratrol, extracted from Polygonum cuspidatum (Japanese knotweed). Analytical characterisation confirms identity and high purity, providing a clearly defined and consistent composition. Resveratrol is available as a single-ingredient formulation here.ReserveNature® (Standardised Resveratrol Extract)
Introduction
Botanical identity and standardisation
Composition and analytical quality
Ingredient verification (identity and purity)
Chemical identity
Chromatographic quantitation
Purity profile
Resveratrol: biochemical context
Human research context
Safety and tolerability
Potential benefits (evidence-led)
Typical intake and formulations
Summary
