Safe, sustainable extracts.

BIOpuro has searched the world and found the safest, cleanest, highest oligomeric proanthocyanidin (OPC) antioxidant available.

the secret behind the bark

Smart global connections mean the best products for you.

Thanks to strategic global partnerships, BIOpuro is proud to provide this unrivaled antioxidant to the North American market, benefiting both product formulators and consumers alike.


Our high OPC pine bark extract is a whole herbal complex that contains all water-soluble phenolic compounds in their natural distribution as they occur in the bark of New Zealand Pinus Radiata trees.

Hence, the extract is a totally natural, unaltered, highly active mixture of these plant compounds that include many different flavonoids, stilbenes and phenolic acids. To place this concentration in perspective, two hundred milligrams of our high OPC pine bark extract (PBE) are equivalent in flavonoid content to 2.2 lbs of fresh vegetables, plus 0.88 lbs of fresh fruits (based on the “USDA database for flavonoid content in foods” counting 29 and 54 different types of fruits and vegetables, respectively).

The most abundant compounds in Pinus Radiata bark are the proanthocyanidins (also called oligomeric proanthocyanidins, OPCs, procyanidins, or condensed tannins). The proanthocyanidins are a complex group of flavonoids that consist of dimers, trimers, oligo- or polymers of catechin and epicatechin. Pinus Radiata includes the proanthocyanidin dimers B1, B3, B6, trimer C2, and other larger oligo- and polymers1,2. Our high OPC PBE contains more than 80% of proanthocyanidins by weight.

Other flavonoids and non-flavonoid phenolics present in our high OPC PBE include monomeric catechin, taxifolin (dihydroquercetin), quercetin, myricetin, stilbenes (piceatannol), and several phenolic acids.

Read about the research and benefits

Clinical studies have proven the multi-benefits of pine bark extract.


Our New Zealand high-OPC pine bark extract is produced using a proprietary, internationally patented*, water-only extraction technology developed by a multi-disciplinary team of researchers & engineers at Canterbury University. The process has advantages versus other methods that often use organic solvents & other chemicals.

*Patents for pure water extraction process in several countries including the USA (US5,968,517), Australia (AUS727,283), New Zealand (NZ329,658), and others.

Water-Only Process

The extraction uses only pure, de-ionized water and New Zealand grown Pinus Radiata bark. No chemicals of any sort are used in the process. This eliminates any possibility of unwanted residues, and makes our pine bark product a 100% natural herbal extract.

Full Polyphenol Compound Spectrum

The process produces a holistic extract from the pine bark that contains the full spectrum of water soluble, health promoting polyphenol compounds with a high concentration of oligomeric proanthocyanidins (OPC) > 80%.

Protecting Maximum Activity

The extraction conditions protect the natural state of the polyphenols preserving maximum antioxidant and natural anti-inflammatory activities.

Eco-Friendly Technology

The entire process is environmentally friendly and does not produce any problematic wastes. Only bark mulch and water exit the process that yields the high OPC pine bark extract as the final product.

Why New Zealand? Why Pine Bark Extract?

For several reasons, experts agree that New Zealand pine bark extract is the “gold standard” of antioxidants:

  • It’s the best free radical neutralizer — both inside and on the outside of the body.
  • New Zealand is unmatched as a clean, environmentally safe and sustainable source.
  • The effectiveness (in vivo) and body-friendly absorption from the cleanest environment on earth.
  • Experts in a wide range of health, medical, and supplemental industries have known for years that high OPC Pine Bark Extract contains one of the most effective flavonoid profiles in the world.

Research has proved New Zealand Pine Bark Extract is one of the best “all encompassing” antioxidants ever discovered— now from the cleanest, most environmentally responsible location on earth.

view clinical trials