Pycnogenol

botanical

What is it

Pycnogenol is a patented standardized extract of French maritime pine (Pinus pinaster) bark, containing a defined mixture of procyanidins, bioflavonoids, and phenolic acids. It is one of the most clinically studied proprietary botanical supplements.

How it works

Pycnogenol works through several complementary mechanisms. Its procyanidins act as potent antioxidants, neutralizing free radicals and recycling other antioxidants like vitamin C and E. It also stimulates endothelial nitric oxide synthase activity, increasing nitric oxide production and improving vascular dilation. Research suggests Pycnogenol modulates inflammation by inhibiting NF-kB activation and reducing inflammatory cytokine production. It also binds to and protects collagen and elastin from enzymatic degradation, which underlies its applications in skin and vascular health. Pycnogenol enhances microcirculation, particularly in capillary beds, by improving capillary resistance and reducing permeability. The extract is well absorbed in the small intestine, with peak plasma metabolite concentrations occurring 4-12 hours after dosing. Some constituents undergo gut microbial metabolism to bioactive smaller phenolics. Effects on circulation and inflammatory markers have been measured within days to weeks of starting supplementation.

Evidence for 6 uses

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Chronic venous insufficiency

Grade B

Good evidence

Several controlled trials show Pycnogenol reduces leg edema, heaviness, and pain in chronic venous insufficiency, with effects often exceeding those of standard compression therapy.

Cardiovascular function

Grade C

Moderate evidence

Trials suggest Pycnogenol improves endothelial function, reduces blood pressure modestly, and may improve cholesterol profiles in metabolic syndrome.

Asthma

Grade C

Moderate evidence

Limited trials in mild-to-moderate asthma suggest Pycnogenol may improve symptom control and reduce inhaled corticosteroid needs, but evidence is preliminary.

ADHD

Grade C

Moderate evidence

Small trials in children with ADHD suggest modest improvements in attention and behavior, but findings are not definitive.

Skin aging

Grade C

Moderate evidence

Trials show improvements in skin hydration, elasticity, and pigmentation with Pycnogenol supplementation over several months.

Diabetic microvascular complications

Grade C

Moderate evidence

Studies suggest improvements in diabetic retinopathy progression and microcirculation in type 2 diabetes, though larger trials are needed.

2 commercial forms

Standardized Pycnogenol extract

Standardized to 65-75% procyanidins; absorbed and metabolized to bioactive forms over 4-12 hours.

The patented and standardized form used in nearly all published research. Look for the Pycnogenol trademark on the label.

Generic pine bark extract

Variable standardization; clinical evidence specific to generic forms is sparse.

May contain similar compounds but lacks the standardized profile and clinical research backing of Pycnogenol.

Dosage

There is no RDA. Most clinical trials use 50-450 mg per day, often divided into 2-3 doses. A typical effective range for general health is 100-200 mg per day. Higher doses up to 360 mg per day have been used for specific conditions like venous insufficiency.

When and how to take it

Take Pycnogenol with food to maximize absorption and minimize gastrointestinal upset. Splitting the daily dose into 2-3 portions taken with meals may produce more sustained effects. Timing relative to sleep is not critical, but consistent daily use over weeks is needed for measurable benefits.

Safety

Pycnogenol is well tolerated. The most common side effects are mild gastrointestinal discomfort, dizziness, and headache, generally affecting fewer than 5% of users. Taking it with food typically eliminates GI symptoms. No serious adverse effects have been reported in clinical trials.

Who should be cautious

People taking blood thinners or scheduled for surgery should consult a clinician and consider stopping use 1-2 weeks before procedures. Diabetics on medication should monitor blood glucose. Safety in pregnancy and breastfeeding is not established and use should be avoided. People with autoimmune diseases should consult a clinician since Pycnogenol may modulate immune function.

Interactions

Pycnogenol may have mild antiplatelet effects and could theoretically increase bleeding risk with anticoagulants or antiplatelet drugs. It may enhance the effects of antihypertensive medications by improving vascular function. Pycnogenol may also modestly affect blood glucose and could enhance the effects of diabetes medications, warranting monitoring.

Frequently asked questions

What is the difference between Pycnogenol and grape seed extract?⌄

Both contain procyanidins, but Pycnogenol is a specific standardized French maritime pine bark extract with a defined composition and extensive clinical research. Grape seed extract has a similar polyphenol profile but different proportions.

How long until I notice effects?⌄

Effects on circulation, blood pressure, and inflammation typically emerge over 4-12 weeks of consistent daily use. Some skin and venous symptoms may improve within 4-6 weeks.

Can I take Pycnogenol every day?⌄

Yes, daily use for months has been studied and well tolerated. Many of the clinical benefits require sustained supplementation.

Is generic pine bark extract just as good?⌄

Generic pine bark extracts vary in composition and lack the clinical research base of patented Pycnogenol. For evidence-based use, choose the Pycnogenol brand.

Are there any drug interactions I should know about?⌄

Pycnogenol may enhance the effects of blood pressure medications, diabetes drugs, and blood thinners. Consult your clinician if you take any of these.

References

  • NCCIH: Pycnogenol — National Center for Complementary and Integrative Health link
  • Wikidata: Pycnogenol — Wikidata link

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Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you're pregnant, breastfeeding, on medications, or managing a chronic condition.