ProveIt Supplements

Independent, evidence-based supplement analysis.

✓ Not Sponsored

✓ No Paid Reviews

✓ Science-Based

Company

  • About Us
  • Our Methodology
  • Contact
  • Blog
  • Authors

Legal

  • Privacy Policy
  • Terms of Service
  • Medical Disclaimer
  • Affiliate Disclosure

Resources

  • All Categories
  • Ingredient Database
  • Browse Supplements
  • FAQ

© 2026 ProveIt Supplements. All rights reserved.

Medical Disclaimer: The information provided is for educational purposes only and is not intended as medical advice. Always consult with a qualified healthcare professional before starting any supplement regimen.

Prove It
Browse SupplementsBlogAuthorsAboutMethodologyFAQ
Get Your Personalized Supplement StackSupplement Stack Quiz
Menu
HomeBrowse SupplementsBlogAuthorsAboutMethodologyFAQ
Clinical OPC 300 mg

Clinical OPC 300 mg

Terry Naturally

#Other
70
Safety72
Efficacy68
Transparency78
Based on Examine, Wikipedia, and 23 other sources

Overview

Clinical OPC 300 mg relies on the potential benefits of oligomeric proanthocyanidins (OPCs) derived from French grape seed extract VX1. While grape seed extract is touted for its antioxidant and health-promoting properties, the efficacy hinges on the absorption and specific characteristics of the VX1 form, which lacks extensive independent research to confirm its superiority. Therefore, the overall effectiveness remains uncertain pending further studies on VX1.

The Good

Contains a standardized dose of 300mg of grape seed extract.

Grape seed extract is known for its antioxidant properties.

Easy to consume capsule form.

The Bad

Efficacy based primarily on one ingredient (OPCs) and its absorption.

The specific form of grape seed extract (VX1) lacks independent validation.

Limited research on the long-term effects of VX1.

Is it for you?

Best For: Individuals seeking antioxidant support, general wellness

Skip If: Pregnant, nursing, or taking other medications without consulting a healthcare professional

Ingredients Analysis

Vx1

300 mg

How to Use

Take one capsule daily, or as recommended by your healthcare practitioner.

Frequency:

Daily

Best Time:

Anytime

When:

As directed by a healthcare professional

Who Should Use This

Best For:

Individuals seeking antioxidant support, general wellness

Recommended Articles

Herbal Boosters & COVID-19 Antivirals: Safe Mix?

Herbal Boosters & COVID-19 Antivirals: Safe Mix?

Herbal supplements may interact with COVID-19 antivirals, requiring careful consideration and further research.

Top Ingredients for Healthy Weight Management

Top Ingredients for Healthy Weight Management

Dietary fiber, protein, omega-3 fatty acids, and water are crucial for managing a healthy weight.

Top Immune Support Ingredients: What Works?

Top Immune Support Ingredients: What Works?

Vitamin D, zinc, and echinacea are key ingredients in immune support supplements, backed by scientific evidence.

Top Anti-Inflammatory Supplement Ingredients

Top Anti-Inflammatory Supplement Ingredients

Curcumin, omega-3 fatty acids, CBD, and Vitamin D are proven to effectively reduce chronic inflammation.