Pycnogenol
A patented standardized French maritime pine bark extract (Pinus pinaster) rich in procyanidins. Reasonable trial evidence for chronic venous insufficiency, ADHD in children, early diabetic retinopathy, and perimenopausal symptoms. Blood-pressure–lowering effect is real but small and inconsistent across recent meta-analyses.
Quick decision guide
May help most
Adults with chronic venous insufficiency, endothelial dysfunction, perimenopausal symptoms, or early diabetic microvascular complications; pediatric ADHD as an adjunct under specialist care.
Common dosing range
100–200 mg/day (research trials commonly use 50 mg 2–3× daily); pediatric ADHD: 1 mg/kg/day; topical formulations also available.
When to expect effects
Days–weeks for symptoms; 8 weeks for menopausal and CVI outcomes.
Watch out for
Mild antiplatelet effect — caution with anticoagulants. Don't use if allergic to pine or pine bark.
Evidence snapshot
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.
Is it worth it for you?
Use this as a quick fit check, not a diagnosis.
Worth considering if…
Probably skip if…
Evidence at a glance
| Goal | Effect | Best fit | Time |
|---|---|---|---|
Chronic venous insufficiency (CVI) Good Evidence | Clinically meaningful reduction in leg heaviness, edema, and microcirculation scores at 100–200 mg/day over 4–8 weeks | Adults with mild-to-moderate CVI (CEAP C2–C4) who want a daily oral adjunct alongside compression therapy | 4–8 weeks |
Pediatric ADHD (adjunct) Limited Evidence | Significant short-term reduction in hyperactivity and inattention; effects revert after stopping | Children with mild-to-moderate ADHD whose families seek adjunctive natural options under pediatric supervision | 1 month |
Early diabetic retinopathy Limited Evidence | Measurable retinal edema reduction and visual acuity gain at 150 mg/day over 2 months in early DR | Type 2 diabetes patients with well-controlled glucose and early diabetic retinopathy under ophthalmology care | 2 months |
Perimenopausal climacteric symptoms Limited Evidence | Improvement on multi-item climacteric symptom scores; modest effect on hot flush frequency | Peri-menopausal women with mild-to-moderate vasomotor symptoms preferring non-hormonal options | 4–8 weeks |
Blood pressure / hypertension Limited Evidence | ≈3 mmHg SBP/DBP reduction in some meta-analyses; null in others | Adults with borderline hypertension who can use it as an adjunct to lifestyle change | 12+ weeks |
Chronic venous insufficiency (CVI)
- Effect
- Clinically meaningful reduction in leg heaviness, edema, and microcirculation scores at 100–200 mg/day over 4–8 weeks
- Best fit
- Adults with mild-to-moderate CVI (CEAP C2–C4) who want a daily oral adjunct alongside compression therapy
- Time
- 4–8 weeks
Pediatric ADHD (adjunct)
- Effect
- Significant short-term reduction in hyperactivity and inattention; effects revert after stopping
- Best fit
- Children with mild-to-moderate ADHD whose families seek adjunctive natural options under pediatric supervision
- Time
- 1 month
Early diabetic retinopathy
- Effect
- Measurable retinal edema reduction and visual acuity gain at 150 mg/day over 2 months in early DR
- Best fit
- Type 2 diabetes patients with well-controlled glucose and early diabetic retinopathy under ophthalmology care
- Time
- 2 months
Perimenopausal climacteric symptoms
- Effect
- Improvement on multi-item climacteric symptom scores; modest effect on hot flush frequency
- Best fit
- Peri-menopausal women with mild-to-moderate vasomotor symptoms preferring non-hormonal options
- Time
- 4–8 weeks
Blood pressure / hypertension
- Effect
- ≈3 mmHg SBP/DBP reduction in some meta-analyses; null in others
- Best fit
- Adults with borderline hypertension who can use it as an adjunct to lifestyle change
- Time
- 12+ weeks
Evidence for 5 uses
AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.
Chronic venous insufficiency (CVI)
Supplement benefitMultiple RCTs, mostly by the Belcaro/Cesarone group, show Pycnogenol 100–200 mg/day improves CVI signs and symptoms (leg edema, heaviness, pain, microcirculation indices) over 4–8 weeks. The Cesarone 2006 comparison found Pycnogenol superior to micronized purified flavonoid fraction (Daflon) on multiple outcomes. Trials are mostly from one research group; independent replication is limited but the mechanistic basis (endothelial NO support, capillary stabilization) is plausible.
Bottom line: Reasonable oral adjunct for CVI. Pair with compression stockings, weight management, and leg elevation — Pycnogenol doesn't replace these.
Pediatric ADHD (adjunct)
Disease adjunctTrebatická et al., 2006 RCT in 61 children with ADHD found Pycnogenol 1 mg/kg/day for 1 month significantly reduced hyperactivity and improved attention vs placebo (CTRS, CPRS, Wisconsin Card Sorting), with reversion to baseline after washout. A small follow-up showed effects on glutathione levels. The trial base is small and from one research group; pediatric guidelines don't include Pycnogenol as first-line therapy. Stimulants and behavioral therapy remain standard.
Bottom line: Promising as an adjunct in mild cases under specialist care, not a replacement for first-line treatment.
Early diabetic retinopathy
Disease adjunctSteigerwalt et al., 2009 RCT in 46 well-controlled type 2 diabetics (HbA1c <7%) with early retinopathy: 150 mg/day Pycnogenol for 2 months improved retinal microcirculation, reduced retinal edema (visualized on OCT), and improved visual acuity vs placebo. Mechanism plausibly involves endothelial NO support and capillary stabilization. Other small Belcaro-group trials extend to diabetic microangiopathy of the leg. Evidence is concentrated in one research group and requires independent confirmation.
Bottom line: Worth discussing with your ophthalmologist as an adjunct to glucose control; not a replacement for established diabetic retinopathy management.
Perimenopausal climacteric symptoms
Supplement benefitErrichi 2011 open trial (n=38) and Yang 2007 placebo-controlled RCT (n=200) showed Pycnogenol 100–200 mg/day for 8–12 weeks improved hot flushes, night sweats, sleep disturbance, and overall climacteric scores in peri-menopausal women. Mechanism plausibly involves NO-mediated vasomotor stabilization. Effects are modest compared with hormone therapy and the trial base is small.
Bottom line: Reasonable non-hormonal option for mild perimenopausal symptoms; not as effective as hormone therapy for severe hot flushes.
Blood pressure / hypertension
Biomarker supportEvidence is mixed and contested. Liu 2018 meta-analysis (9 trials, n=549) found ~3 mmHg reductions in both SBP and DBP, with larger effects in hypertensive subgroups and longer trials. The 2020 Fogacci PRISMA meta-analysis (7 trials, n=626) found no significant effect on any BP measure. The discrepancy reflects trial heterogeneity and selection. At best, the BP effect is small and unlikely to replace antihypertensive medication.
Bottom line: Don't rely on Pycnogenol as primary hypertension management; the BP effect is small and contested.
Evidence is mixed
Liu 2018 (positive) and Fogacci 2020 (null) reach opposite conclusions. Trial heterogeneity and small samples explain much of the discrepancy.
How it works
How to take it
What to track
Bottom line: 100–200 mg/day split into 2–3 doses with food is the practical default. Reassess at 8 weeks; if no benefit, stop.
3 commercial forms
Compare the main delivery options and what they’re best suited for.
Pycnogenol (Horphag patented)
Trial-testedThe patented French maritime pine bark extract used in nearly all published RCTs. Standardized to 65–75% procyanidins. Available in 25, 50, and 100 mg tablets/capsules.
Reference standardized form.
Generic pine bark extract
Cheaper alternativeOther pine-bark extracts sold as 'French maritime pine bark.' May or may not match Pycnogenol's procyanidin profile and standardization; clinical trial data don't necessarily apply.
Variable; check standardization.
Topical Pycnogenol cream / serum
Skin useCosmetic applications use Pycnogenol for antioxidant and anti-pigmentation claims. Some small studies show modest benefit for melasma and skin elasticity; cosmetic-grade only.
Topical effects limited to local skin layers.
Safety
Know the common side effects, key cautions, and who should avoid it.
Common side effects
Serious risks
Pycnogenol inhibits platelet aggregation — increased bleeding risk when combined with warfarin, DOACs, antiplatelet agents, or before surgery. Stop 1–2 weeks before elective procedures.
Allergic reactions — do not use if allergic to pine, pine bark, or pine pollen. Discontinue if rash or hives develop.
May have additive blood-pressure–lowering and blood-glucose–lowering effects with antihypertensive or antidiabetic medications.
Who should avoid it
- People on warfarin, DOACs, or antiplatelet drugs without medical supervision.
- People allergic to pine, pine bark, or pine pollen.
- Pregnant or breastfeeding people — insufficient safety data.
- People with autoimmune diseases — Pycnogenol may stimulate immune function; theoretical concern, not well-studied.
Pregnancy & breastfeeding
Avoid during pregnancy and breastfeeding — clinical safety data are insufficient. There is no medical reason to supplement Pycnogenol during pregnancy.
Bottom line: Well tolerated for most adults at 100–200 mg/day. Main practical cautions are bleeding risk on anticoagulants, pine allergy, and pregnancy avoidance.
Interactions
Pycnogenol inhibits platelet aggregation; additive bleeding risk with anticoagulants and antiplatelets. Stop 1–2 weeks before surgery.
Pycnogenol may modestly lower BP (effect inconsistent across meta-analyses); could theoretically add to antihypertensive effects. Monitor BP if combining.
Some trials suggest mild improvement in glycemic markers; possible additive hypoglycemic effect with diabetes medications. Monitor blood glucose.
Pycnogenol has been shown to enhance immune response in some preclinical models; theoretical interaction with immunosuppressants. Limited clinical data.
Both may modestly affect platelets; additive bleeding-risk theoretically possible. Monitor for unusual bruising on long-term combined use.
Choosing a product
What to look for on the label — and what to be skeptical of.
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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 by claim
Chronic venous insufficiency (CVI)
Pediatric ADHD (adjunct)
Trebatická et al., 2006 — European Child & Adolescent Psychiatry (2006) link
Early diabetic retinopathy
Steigerwalt et al., 2009 — Journal of Ocular Pharmacology and Therapeutics (2009) link
Perimenopausal climacteric symptoms
Errichi et al., 2011 — Panminerva Medica (via PubMed) (2011) link
Blood pressure / hypertension
Track Pycnogenol with Pilora
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Coming to App StoreDisclaimer: 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.