Clinical OPC: Science-Backed French Grape Seed Extract VX1

ARTICLE BY | Julie Hoerth
Image of grapes with science lab containers

Groundbreaking ingredients are a hallmark of the Terry Naturally® brand, and our Clinical OPC® line is no exception. Clinical OPC formulas feature French grape seed extract VX1, a premium grape seed backed by seven published studies, providing scientifically validated support for overall wellness.* 

What Makes Clinical OPC Special?

Grape seed extract is one of nature’s most trusted botanicals, highly valued for its antioxidant properties and support for cardiovascular and cellular health. Its power comes from oligomeric proanthocyanidins (OPCs), a group of compounds found in grapes, blueberries, tea, and other nutrient-rich foods. OPCs are antioxidants that protect cells from oxidative stress, support heart and brain health, maintain healthy blood sugar levels, and support cholesterol balance.*

However, not all OPCs are created equal. They only support the body if they’re small enough to be absorbed. The high-quality French grape seed extract in all our Clinical OPC products contains small, low-molecular-weight OPCs, which are easily absorbed and highly effective. You can count on Clinical OPC to deliver reliable results!


Health Benefits of Clinical OPC*

French grape seed extract VX1 is a very powerful antioxidant, featuring an ORAC value of over 2,000,000 for advanced cellular protection and healthy aging support.* Its exceptional antioxidant capacity helps defend against oxidative stress and cellular health damage while supporting:

  • Heart and artery health
  • Healthy blood pressure levels
  • Cholesterol balance
  • Healthy blood sugar levels
  • Immune function
  • Focus and concentration
  • Weight management††
  • Liver function*

Science image of dish and grapes

Never Adulterated • Verified Grape Seed Extract

Never Adulterated—Guaranteed

Quality is at the heart of Clinical OPC. Many grape seed extracts on the market are substandard, and some are even adulterated with fillers like peanut skins, a top allergen. Clinical OPC is verified, tested, and never adulterated, so you know exactly what you’re getting.

Clinical OPC Formulas

Clinical OPC is available in four unique formulas, making it easy to choose the right level of support for your needs: 150 mg, 300 mg, Extra Strength 400 mg, Clinical OPC Heart—includes additional ingredients for more targeted cardiovascular support*

Product images

No matter which formula you choose, Clinical OPC helps you take an active role in supporting your overall health.* 

With Clinical OPC, you’re choosing more than a grape seed extract—you’re choosing a product rooted in science, quality, and results you can count on.


†Supports healthy levels already within normal range.
††In conjunction with a healthy diet and exercise regimen. These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.
About | Julie Hoerth
Julie has been a writer, researcher, and author in the Natural Health industry for nearly 15 years. A wife and mom to three young daughters, Julie is infinitely interested in studying the science behind how botanicals and nutrients can support and improve the health of her loved ones, and all who read her work.