Pycnogenol® (Pine Bark Extract): Clinical Evidence & Substantiation Summary
What Is Pycnogenol® (Pine Bark Extract)?
Pycnogenol is a standardised extract from French maritime pine bark (Pinus pinaster), rich in procyanidins. It has one of the broadest clinical evidence bases of any botanical, with over 160 clinical studies across cardiovascular, skin, joint, and cognitive health.
Mechanism of action: Pycnogenol's procyanidins stimulate eNOS for nitric oxide production, inhibit COX-1 and COX-2 enzymes, stabilise collagen and elastin via cross-linking inhibition, and enhance glutathione recycling for antioxidant defence.
Clinical Evidence Summary
Below are 3 key clinical studies on Pycnogenol® (Pine Bark Extract). Nutra Comp analyses 160+ studies in its full clinical evidence report.
Pycnogenol and blood pressure: a meta-analysis
Population: 9 RCTs, 549 participants
Key finding: Pycnogenol (100–200 mg/day) significantly reduced systolic blood pressure (WMD: -3.2 mmHg, p=0.004) in hypertensive subjects.
Pycnogenol for skin ageing: a systematic review
Population: 7 RCTs
Key finding: Pycnogenol (75 mg/day) significantly improved skin elasticity, hydration, and reduced hyperpigmentation after 12 weeks.
Pycnogenol and joint health in osteoarthritis
Population: 5 RCTs, 597 patients
Key finding: Pycnogenol (100–150 mg/day) significantly reduced WOMAC pain scores and improved stiffness versus placebo (p<0.001).
Evidence-Based Structure–Function Claims
Sample FDA-compliant structure–function claims generated by Nutra Comp, each linked to clinical evidence and scored for confidence.
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Key Terms
Frequently Asked Questions
Is Pycnogenol FDA approved?
Pycnogenol is a dietary supplement ingredient with self-affirmed GRAS status. It is a branded extract backed by over 160 published clinical studies.
What are the most studied benefits?
Pycnogenol has evidence across cardiovascular health, skin ageing, joint comfort, cognitive function, blood sugar management, and venous health.
What dosage is used in clinical studies?
Most studies use 50–200 mg/day. 100 mg/day is the most common dose across indications.
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