OPC 300
Grape Seed Extract

300mg OPC

Our ultra pure and high-dose OPC 300 contains a full 300mg of OPC per capsule, derived from French Chardonnay grape seeds. OPC content guaranteed by HPLC testing at TU Braunschweig. Ultra pure extraction process using only water and edible ethanol. Vegan, no additives. 240 capsules
  • Natural source: 100% Chardonnay grape seeds from France.
  • Highly dosed: a full 300mg of pure OPC content per capsule
  • Premium grape seed extract with 95% total polyphenol content
  • OPC content confirmed by HPLC laboratory test (University of Braunschweig)
  • Contains bioactive OPC di- to pentamers
  • High purity extraction process: gentle extract only from water & edible ethanol
  • No use of solvents like methanol, ethyl acetate, acetone or N-hexane
  • HPLC laboratory test: OPC content confirmed by Braunschweig University
  • vegan, gluten-free, without genetic engineering
240 capsules

Delivery : 1–3 business days

Incl. VAT, excl. Shipping

€160.10 / 1kg
In stock

Premium Bioactive Ingredients

  • 100% premium grape seed extract 
  • High-dose OPC: 300mg pure OPC per capsule (di- to polymers)
  • OPC content confirmed via reliable HPLC testing method by the TU Braunschweig
  • Di- to pentamer content: 11.7%
  • Di- to tetramer content: 9.96%
  • Only from white Chardonnay grapes from France as natural premium OPC source
  • Guaranteed minimum content of 95% polyphenols
  • Ultra pure extraction process using water and edible ethanol, free from chemical residues such as methanol, ethyl acetate, acetone, and n-hexane
  • Vegan, non-GMO, gluten-free, soy-free

How are we different?

Our OPC 300 capsules are 100% extracted from the seeds of French Chardonnay grapes, which are considered the best source of natural OPC.

The quality of different OPC products differs enormously, as the actual content of OPC varies greatly. Conventional tests such as the DMAC and vanillin tests provide misleading and far too high OPC values here, which are sometimes 400% higher than the actual OPC content. Only HPLC controls can confirm the true OPC content.

Our OPC 300 has been tested by the TU Braunschweig for its actual OPC content and the test results are published by us in their entirety. Our grape seed extract from French Chradonnay grapes has a pure content of at least 95% polyphenols. Many manufacturers confuse this with the actual OPC content. According to the manufacturer of our raw materials, this content is 77.6%. We were able to confirm this value with an HPLC laboratory test broken down into mono-, di-, tri-, tetra-, penta- and polymers, the most reliable measuring method, carried out by the Technical University of Braunschweig: minus the monomers not counted as OPCs, the OPC pure content was around 77.5%. For the di- to pentamers, which are relevant according to the strict interpretation, the content was 11.7%.

In contrast to other products, our OPC 300 is extracted completely without solvents, using only water and edible ethanol. This allows us to achieve a highly pure OPC concentrate that has never been in contact with common chemical solvents such as N-hexane. All products are guaranteed free of additives such as maltodextrin or peanut powder, which are added by many manufacturers for cost reasons but do not have to be declared.

As capsule shells we use special HPMC capsules, which, unlike most other HPMC or Pullulan capsules on the market, are manufactured 100% without the auxiliary substances carrageenan and PEG, which do not have to be declared. For packaging, we use light-protected and environmentally friendly amber glass instead of plastic.


  • Premium active ingredients in their purest form
  • Sourced directly from the world’s best producers
  • Our select raw materials are the basis of all our formulations
  • Complete avoidance of all unnecessary additives and adjuvants
  • Exclusive use of valuable natural ingredients for additives
  • We voluntarily declare all ingredients
  • All extractions performed without the use of chemical solvents
  • Custom production when necessary, in order to achieve the highest possible level of purity
  • Independent laboratory testing available on product pages
  • Raw materials sourced only from premium suppliers who are committed to fair working conditions
  • Amber glass and compostable pouches used for packaging
  • Vegan capsule shells, free from PEG and carrageenans
  • Packaged in the EU according to HACCP, GMP and ISO 22000:2018 standards
  • Stored in non-toxic containers
  • Shipped in mineral oil-free boxes
  • All products guaranteed 100% free from magnesium stearate, silicon dioxide, nanoparticles (no legal opportunism), genetic engineering, artificial colours and flavours, titanium dioxide and added sugar & sweeteners


OPCs (Oligomeric Proanthocyanidins) named also as vitamin P, are a group of substances belonging to the flavonols, which consist of polymers of catechins and epicatechins. Proanthocyanidins are present in a whole range of fruits and plants, including the seeds and skins of grapes, in berries and citrus fruits, but also in the protective bark layer of trees.

The various proanthocynidins are categorised by their number of units (e.g. monomer for one unit, dimer for two). The exact definition of OPC is unclear and may include only di- to tetramers, di- to pentamers, di- to hexamers, or even all proanthocyanidins except monomers.

For a long time, only the dimers, i.e. consisting of two, and the trimers, consisting of three units, were considered to be bioactive. However, this has since been disproven, allowing a complex interaction of all components of the grape seed extract (including the polymeric proanthicyanidins such as hexamers and heptamers) to be used. OPC compounds are contained in large quantities, especially in pine bark and grape seeds, in which the individual proanthocyanidins differ from each other both in form and in their effect. There is also a notable amount of vital proanthocyanidin-B3-3'-O-gallate in grape seed extract.


Recommended Dose

Take 1 capsule (300mg OPC) with 200ml of water before a meal.

Food Supplement

Do not exceed the recommended dose. Nutritional supplements cannot replace a balanced and varied diet. Keep out of reach of children.


Store in a cool, dry place away from direct sunlight and heat.



Ingredients: Grape Seed Extract (from French Chardonnay Grapes).
Capsule shells: Hydroxypropyl Methylcellulose.
Contains: 240 capsules

Ingredients per Daily Dose (1 Capsule) % NRV*
Grape seed extract 400mg -
of which pure OPC (without monomers) 300mg -
of which di- to pentamers 50mg -

* Nutrient Reference Value

Per capsule: 300mg OPC
In total: 72,000mg OPC / jar


Product Details

German Pharmaceutical Number (PZN): 16151422
Origin:  French Chardonnay grape seed extract; water/edible ethanol extraction process

In-house production in Europe, bottling and encapsulation in the EU according to HACCP, GMP / ISO 22000:2018 standards
Finished products packaged in amber glass jars, and stored in non-toxic containers
Shipping in mineral oil-free boxes

Capsules:  Plant-based cellulose (HPMC). Vegan
Premium HPMC quality: Free from controversial additives such as carrageenans and PEG
Packaging:  Amber glass jar to protect against light and oxidation (free from plasticisers and BPA)
To Reuse:  Remove product label by soaking the jar in warm water for 5 minutes. Glue residue can be removed with dish soap.

Laboratory Tests

The purity of our formulas is important to us. This is why we have both our raw ingredients as well as our finished products extensively tested by independent laboratories to confirm purity and active ingredient content. Here, we have provided the results of some of the tests carried out on this product.

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Our Philosophy

For thousands of years, cultures all over the world have been using medicinal plants and nutritious foods to naturally foster and maintain vitality and good health.

With our products, we try to emulate this ancient wisdom as much as possible.

Consequently, our philosophy is simple: everything we do meets the highest standards of quality and purity; our focus is on organic and natural ingredients.

We follow this philosophy with meticulous care on all levels and down to every last detail.

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