Pycnogenol® (Pine Bark Extract): Clinical Evidence & Substantiation Summary

Clinical Trials
160
Strongest Evidence
Cardiovascular & Skin Health
Typical Dosage
50–200 mg/day
Common Forms
Pycnogenol® (65–75% procyanidins)

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.

Meta-analysis2017PMID: 28627214

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.

Systematic review2018PMID: 30466985

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.

Meta-analysis2018PMID: 29354733

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.

8
Supports cardiovascular health and healthy circulation
Category: Cardiovascular · Confidence: 8/10
7
Supports skin health and a youthful appearance
Category: Skin Health · Confidence: 7/10
7
Supports joint comfort and flexibility
Category: Joint Health · Confidence: 7/10

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Related Ingredients

Vitamin C
168 studies · Immune Function
Resveratrol
41 studies · Cardiovascular & Anti-ageing

Key Terms

Meta-AnalysisStandardised ExtractClinical Trial

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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