Pycnogenol
Pycnogenol (Pine Bark Extract)
Pycnogenol is a standardized proprietary extract from the bark of the French maritime pine tree (Pinus pinaster), containing a concentrated blend of procyanidins, bioflavonoids, and phenolic acids. It is primarily used for its antioxidant, anti-inflammatory, and vascular-protective properties, with clinical applications in cardiovascular health, cognitive function, chronic venous insufficiency, and metabolic syndrome. Extensive human clinical trials support its use for improving endothelial function, reducing oxidative stress markers, and alleviating symptoms of conditions ranging from osteoarthritis to ADHD.
Mechanism of Action
Pycnogenol's primary mechanisms involve potent free radical scavenging activity and upregulation of endogenous antioxidant enzymes, alongside inhibition of NF-κB signaling to reduce pro-inflammatory cytokine production (TNF-α, IL-1β, IL-6). It stimulates endothelial nitric oxide synthase (eNOS), increasing nitric oxide bioavailability to promote vasodilation and improve blood flow, while also inhibiting platelet aggregation by reducing thromboxane B2 synthesis. Additionally, it inhibits α-glucosidase and angiotensin-converting enzyme (ACE), contributing to modest glucose-lowering and blood pressure-reducing effects.
Evidence by Health Goal(17 goals)
Dosing Protocols
With meals
Most clinical trials use 100mg/day for general antioxidant and cardiovascular benefits. Higher doses of 150-200mg/day have been used for chronic venous insufficiency, ADHD, and osteoarthritis. Some protocols split the dose into two administrations (e.g., 50mg twice daily) to maintain more consistent plasma levels. Taking with food reduces gastrointestinal sensitivity.
Safety & Side Effects
Pycnogenol has a well-established safety record across numerous clinical trials in adults, generally considered safe at doses up to 200mg/day for periods up to one year. Caution is warranted in individuals on anticoagulants, antiplatelet drugs, or antihypertensives due to additive effects, and it should be avoided in pregnancy and lactation due to insufficient safety data.
Possible Side Effects
- !Gastrointestinal discomfort including nausea, stomach upset, or diarrhea, particularly at higher doses or on an empty stomach
- !Headache, reported in a minority of users especially during initial use
- !Dizziness, likely related to blood pressure-lowering effects
- !Mouth ulcers or oral irritation in sensitive individuals
- !Mild skin rashes or allergic reactions, particularly in individuals with pine or conifer allergies
- !Insomnia or restlessness reported rarely at high doses
Interactions
- -May enhance anticoagulant and antiplatelet effects of warfarin, aspirin, and clopidogrel — increased bleeding risk
- -Additive blood pressure reduction when combined with antihypertensive medications — monitor for hypotension
- -May enhance hypoglycemic effects of metformin and other antidiabetic drugs — blood glucose monitoring recommended
- -May interact with immunosuppressants (e.g., cyclosporine) due to immune-modulating activity
- -Theoretical additive effects with other potent antioxidant supplements (Vitamin C, Vitamin E, alpha-lipoic acid) — generally considered beneficial but monitor for excessive blood pressure lowering
Cost & Where to Buy
Cost varies significantly based on brand, dosage per capsule, and whether the product uses the authentic trademarked Pycnogenol extract versus generic pine bark extract. Authentic Pycnogenol (Horphag Research licensed) commands a premium. At 100mg/day, a 30-count 100mg capsule bottle typically costs $20-$55 retail.
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