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If you have ever looked into plant-based polyphenols, you have probably come across grape seed extract. It is packed with procyanidins, a group of substances naturally found in grape seeds. This supplement from LUTO Supplements provides 166.7 mg of grape seed extract per capsule, standardized to 95% PCO and 30% OPC. These are not random abbreviations. They tell you exactly what part of the extract you are getting, and that is where the difference lies.
OPC stands for oligomeric proanthocyanidins. PCO stands for procyanidin oligomers. It sounds complicated, but here is the bottom line: grape seeds contain all kinds of polyphenols. Some are small molecules, while others form long chains. The small, oligomeric variants are the OPCs and PCOs. That is why standardization matters. A grape seed extract without specification can contain anything. With this product, you know that 95% of the extract consists of procyanidin oligomers. That is a substantial concentration.
Many people wonder why there are two percentages on the label. This has to do with measurement methods. OPC and PCO partially overlap. They belong to the same family of polyphenols from grape seeds. The PCO percentage (95%) indicates the total oligomeric procyanidin fraction. The OPC content (30%) is a more narrowly defined subset of that. In practice, this means: you get an extract with a fixed proportion of oligomeric procyanidins. Grape seed extract without these specifications is often less transparent about exactly what is in it.
What many people do not know: this product contains olive oil in addition to grape seed extract. Olive oil serves as the carrier here. The formula has also been deliberately kept simple: potato starch as a filler and a gelatin capsule. No long list of additives.
LUTO Supplements has this grape seed extract produced in Germany. Production falls under DIN EN ISO 9001 and HACCP, two quality systems that ensure control over purity and consistency. Every batch is tested. For a supplement where standardization is so crucial, that makes a difference. Claiming an OPC content of 30% is only worth something if you actually measure and verify it. With 90 capsules per package, you have a 45-day supply with two capsules per day.
In short: this is a concentrated grape seed extract that clearly states what is in it. No vague percentages, no unnecessary additives. Just grape seed with a high oligomeric fraction, supplemented with olive oil as a carrier.
The extract is standardized to 95% PCO. This means that almost the entire extract consists of oligomeric procyanidins. Many grape seed extracts do not list standardization or are considerably lower.
Two capsules provide 333.4 mg of grape seed extract, standardized to 95% PCO and 30% OPC.
In addition to grape seed extract, each capsule contains olive oil. This serves as a carrier, with no additional additives.
Production takes place in Germany under DIN EN ISO 9001 and HACCP certification. Each batch is tested for purity. For a product where standardization is so crucial for quality, this control makes a concrete difference.
* Percentage van de referentie inname volgens Verordening (EU) Nr. 1169/2011.
** Reference intake unknown.
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Grape seed extract is a concentrated extract from the seeds of grapes (Vitis vinifera). These seeds are full of polyphenols, a broad group of plant-based compounds. Through extraction and standardization, the concentration of specific polyphenols, such as procyanidins, is increased compared to what you would get from eating grapes. The higher the standardization, the more precisely you know what is in each capsule.
OPC stands for oligomeric proanthocyanidins and PCO for procyanidin oligomers. Both terms refer to small chains of polyphenols from the grape seed. They largely overlap, but are determined using different measurement methods. The PCO content of 95% indicates the total oligomeric fraction, while the OPC content of 30% is a more narrowly defined part of that.
Yes, grapeseed extract is intended for daily use. With regular intake, side effects are usually mild, such as slight stomach upset. Take the capsules with a meal; this is gentler on your stomach. If you are taking blood thinners or other medication, please consult your doctor first.
With the recommended dosage of 2 to 3 capsules per day, you have a supply for 30 to 45 days. This is comparable to most grape seed extracts on the market. The difference lies in the standardization: 95% PCO is a strong concentration. You are paying for an extract that is transparent about its contents, not for a large pot with an unclear concentration.
Polyphenols exist in different sizes. Some form long molecular chains (polymers), while others are short (oligomers). Oligomeric procyanidins are the short chains. This extract is standardized to the oligomeric fraction rather than total polyphenol content.
Both come from grapes, but from different parts. Resveratrol is mainly found in the skin and is isolated as a single polyphenol. Grape seed extract comes from the seeds and contains a broad spectrum of procyanidins, which are chains of multiple polyphenols linked together. They are therefore related but different substances with a different polyphenol profile. Which one you choose depends on what you are looking for: a single substance or a broader spectrum from the grape seed.
