Oligomeric proanthocyanidins (OPCs) and pine bark extract (Pycnogenol) are the headline ingredients shoppers see on the OPC-3 product page.
This is shopping and lifestyle content only — read the live Shop.com label for serving size and warnings.
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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 Shop.com 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
- CTA keeps johnny520 in every market link
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Alternate global entry (global.shop.com/johnny520)
Affiliate link — commission may apply. 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.