If you are comparing grape seed, pine bark extract, red wine, bilberry, and citrus bioflavonoids on the OPC-3 listing, this nutrient angle explains the blend, then routes you to research and checkout.
Label ingredient snapshot
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Grape seed extract
Vitis vinifera seed extract
One of the OPC sources on the product page. Shoppers compare using proanthocyanidin / OPC keywords—serving size and warnings come from the live listing.
PubMed indexes oligomeric proanthocyanidins literature; linked for further reading only—no outcome claims.
Related keywords: grape seed extract, grape seed OPC, proanthocyanidins, antioxidant powder
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Pine bark extract (Pycnogenol)
Pinus pinaster bark extract
The headline pairing on this angle page. Listings show pine bark extract alongside the Pycnogenol trademark—confirm the English name and Taiwan 愛尚它 label on the live page.
The ingredient topic page links to independent indexes; third-party sources discuss ingredient classes, not this SKU.
Related keywords: Pycnogenol, pine bark extract, OPC blend, OPC-3
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Red wine extract
Red wine polyphenol extract
A plant-source item in the blend. We describe label wording only—no alcohol or disease-related discussion.
For comparisons, use the OPC / Pycnogenol topic page, then return to the product cluster.
Related keywords: red wine extract, polyphenols, plant blend
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Bilberry
Vaccinium myrtillus fruit extract
A berry-source label item. Shoppers sometimes search bilberry with eye-health keywords—we match label language without medical promises.
See the ingredient topic and label-facts pages for deeper reading.
Related keywords: bilberry, berry extract, Vaccinium myrtillus
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Citrus bioflavonoids
Citrus bioflavonoid complex
Listed alongside the OPC blend. Helpful if you want the full formula before ordering.
Research and certification context: ingredient topic page (NIH / FDA / PubMed).
Related keywords: bioflavonoids, citrus flavonoids, citrus bioflavonoid complex
This is shopping and lifestyle content only — read the live product label for serving size and warnings.
When you are ready, use the country-name buttons so the order stays on Chengtong Zhihui's purchase path.
Research & certification references
Third-party sources below discuss the OPC / Pycnogenol ingredient class—not this specific SKU. They do not prove this product treats any disease. Always read the live product label.
Reference locale (EN): U.S. NIH, FDA, and PubMed. Traditional Chinese pages use Taiwan MOHW/TFDA/HPA; Japanese pages use MHLW/NIHN. Do not mix locales on one page.
Independent research
- PubMed — oligomeric proanthocyanidins (OPC) literature · NIH / NLM
- PubMed — Pycnogenol clinical studies index · NIH / NLM
- Pycnogenol — published research library · Horphag Research (ingredient sponsor)
Quality & certification context
- FDA — questions and answers on dietary supplements · U.S. FDA
- NSF — dietary supplement GMP certification overview · NSF International
What shoppers usually compare
- Listing-focused: OPC sources + Pycnogenol called out on-page
- Powder format vs softgel — different prep habit
- Exclusive Isotonix / 愛尚它 brand lane
- Each market CTA uses a verified purchase route
Ready to order? Use the verified buy button for your market.
Purchase link disclosure: This page contains purchase links to an independent distributor website. The distributor may receive compensation from eligible purchases, at no extra cost to you. This is not medical advice.
Supplement note: These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Lifestyle shopping content only. Not medical advice.