Interactions on record — worth a quick check against your medications. Based on 1 of 2 ingredients. Check your meds →
Dietary supplement

Pine Bark Extract Ingredients & Drug Interactions

by PureBulk.com

Powder Category: Botanical
Most serious interaction: Moderate
The interaction bottom line Most serious interaction: Moderate

Pine Bark Extract is a dietary supplement by PureBulk.com with 2 active ingredients. Its ingredients are commonly taken for circulation and vein health, antioxidant support, skin health and aging.Based on those ingredients, 327 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Pine bark extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

HelloPharmacist Scorecard of Pine Bark Extract by PureBulk.com

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 2 of its 2 active ingredients.
  • No proprietary blends here — you can verify the dose of every single component.

Pine Bark Extract powder contains two active ingredients: maritime pine bark extract and proanthocyanidin. Maritime pine bark extract is the primary active component and is where the researched effects come from.

There are no inactive ingredients listed for this product.

Does it work?

Moderate evidence
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Moderate

Some clinical evidence supports this product's ingredients for its stated purpose, but it isn't conclusive.

Why this rating?
  • The label markets this product for: Circulation and vein health support.
  • We looked for evidence on: Chronic venous insufficiency (CVI), Varicose veins, Raynaud syndrome, Hemorrhoids, Microcirculation, Venous insufficiency — and 1 related terms.
  • The strongest evidence on file: Maritime Pine is rated "Possibly Effective" for Chronic venous insufficiency (CVI) (Natural Medicines).
  • Also on file: Maritime Pine is rated "Insufficient Reliable Evidence To Rate" for Hemorrhoids, Varicose veins, Raynaud syndrome.

Maritime pine bark extract carries "Possibly Effective" ratings for osteoarthritis and chronic venous insufficiency (poor circulation in the legs), meaning there's some clinical support but the evidence isn't definitive. It's rated "Possibly Ineffective" for high cholesterol, so don't expect it to meaningfully lower your lipid levels.

The extract is also listed as "Possibly Effective" for asthma, though again the evidence is limited. Proanthocyanidin's effectiveness is not established in our data.

The evidence, ingredient by ingredient Maritime Pine

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Maritime pine bark extract is generally well tolerated in studies, though long-term safety hasn't been fully established. The most common side effects when taken by mouth are stomach upset, dizziness, and vertigo; headache and chest pain have been reported in individual cases, though causation wasn't clear.

During pregnancy, there isn't enough safety data, so the advice is to avoid it. The same applies to breastfeeding — insufficient data means you should skip it while nursing.

Side effects, ingredient by ingredient Maritime Pine

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Maritime Pine.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; immunosuppressants / transplant drugs; diabetes medications.
  • For scale: 327 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

Check with us before taking this if you're on blood thinners or antiplatelet drugs (like warfarin or aspirin), diabetes medications, or immunosuppressants. Maritime pine bark extract may increase bleeding risk, lower your blood sugar further, or interfere with immune-suppressing therapy.

These are Moderate-severity interactions and warrant a close look at your specific drugs.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with some supporting evidence for its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

This product may help with osteoarthritis or leg circulation issues, but it's worth a conversation with your pharmacist before starting — especially if you take blood thinners, diabetes medications, or immunosuppressants. The interaction risks are moderate and manageable with monitoring, but they're real.

Long-term safety data is thin, and it's not recommended in pregnancy or while breastfeeding.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 1 of 2 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Jun 25, 2013.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about Pine Bark Extract, straight from the product label.

Brand PureBulk.com
Net contents 100 Gram(s); 3.53 oz.
Market status On market
Date entered into DSLD Jun 25, 2013
DSLD ID 23200
Product type Botanical
Supplement form Powder
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Gluten Free, Dairy Free, Sugar Free
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for Pine Bark Extract by PureBulk.com, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
250 mg
Maximum serving Sizes:
250 mg
Servings per container
400
IngredientAmount% DV
Pine bark extract250 mg--
Proanthocyanidin238 mg--

Other ingredients: None

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
General Statements

Derived from Pinus massoniana Lamb bark

US Standard Measuring Spoons Spoon Size (level) milligrams 1/16 teaspoon 187 1/8 teaspoon 375 1/4 teaspoon 751

Precautions

Consult your health professional before use.

Do not use with blood-thinning agents.

Discontinue use after 12 weeks.

Warning: This product is not intended for use by those with a serious medical condition or pregnant or lactating women.

Consult your physician before use.

Keep out of reach of children.

Storage

Storage: Keep dry, cool & dark

Formulation

Free of: sugar, soy, dairy, yeast, gluten, corn and additives.

Suggested/Recommended/Usage/Directions

Directions: As a dietary supplement, take 250 mg (rounded 1/16 tsp) a day, or as directed by physician.

FDA Disclaimer Statement

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

See for yourself

Pine Bark Extract by PureBulk.com label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

What’s inside

The Ingredients in Pine Bark Extract by PureBulk.com

These are the 2 active ingredients this product is made of. Select any to open its full monograph.

Serving size250 mg Dosage formPowder Servings per container400 Amounts shown are per serving.

Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.

Pine bark extract

Interacts with
327 drugs
250 mg per serving

Maritime pine bark extract (often sold as Pycnogenol) is a plant-based antioxidant most studied for circulation, vein, and skin health. Some research...

Pine bark extract monograph & interactions

Proanthocyanidin

238 mg per serving

Other (inactive) ingredients: None. These complete the product’s ingredient list but are not active constituents.

Interaction report

Pine Bark Extract by PureBulk.com Drug Interactions

Want to check YOUR meds against Pine Bark Extract?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

Go to the checker
327Drugs
327 Moderate

Ingredients driving the most interactions

Each ingredient & the kinds of drugs it affects

For each ingredient in Pine Bark Extract with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.

Pine bark extract3 drug types · 327 drugs

Anticoagulant/Antiplatelet Drugs

Theoretically, maritime pine bark extract might increase the risk of bleeding when used with antiplatelet or anticoagulant drugs.
Clinical research suggests that maritime pine bark extract inhibits platelet aggregation. However, the clinical significance of this effect is unclear.

Likelihood Possible Evidence D
Antidiabetes Drugs

Theoretically, maritime pine bark extract might increase the risk of hypoglycemia when used with antidiabetes drugs.
One clinical study shows that maritime pine bark extract decreases blood sugar in patients with diabetes being treated with antidiabetes agents. Monitor blood glucose levels closely. Dose adjustments might be necessary.

Likelihood Possible Evidence B
Immunosuppressants

Theoretically, maritime pine bark extract might decrease the effectiveness of immunosuppressant therapy.
In vitro and animal research suggests that maritime pine bark extract has immunostimulant activity. This effect has not been reported in humans.

Likelihood Possible Evidence D
The maker

Brand information

Manufacturer and brand details for Pine Bark Extract, from the product label.

PureBulk.com

See all PureBulk.com products
Name
PureBulk.com
City
Roseburg
State
OR
ZipCode
97471
Phone Number
(541) 679-1500
Web Address
PureBulk.com
Pharmacist Counseling Corner

Pine Bark Extract by PureBulk.com: Common Questions

Does Pine Bark Extract by PureBulk.com interact with any medications?
Yes. Based on its ingredients, Pine Bark Extract has a known interaction with 327 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Pine Bark Extract contains 2 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Will this help my osteoarthritis?
Maritime pine bark extract is rated possibly effective for osteoarthritis, which means there's some clinical evidence it may help, but it's not a slam-dunk. Results aren't guaranteed, and you'd want to discuss whether it makes sense for your situation with your doctor or pharmacist.
What are the most common side effects I should expect?
Most people tolerate it well, but stomach upset, dizziness, and vertigo are the most commonly reported side effects when taken by mouth. Headache has also been reported. If you feel dizzy or your stomach is bothering you, let your pharmacist know.
Is it safe to take this while pregnant or breastfeeding?
There isn't enough safety data for either pregnancy or breastfeeding, so the advice is to avoid it during both. Talk with your doctor or pharmacist about your specific situation before starting.
Can this lower my blood sugar if I'm diabetic?
Yes — one clinical study found that maritime pine bark extract decreases blood sugar. If you're already on diabetes medication, combining them could push your glucose too low, so close monitoring and possible dose adjustments are necessary. Check with your pharmacist before adding this.
What's the difference between the two active ingredients here?
Maritime pine bark extract is the researched ingredient with documented effects on osteoarthritis and circulation. Proanthocyanidin is also listed as active, but we hold no effectiveness or interaction data for it.
How long does it take to work?
The product facts don't specify a timeline for results. That's something to discuss with your pharmacist or the research literature on whichever condition you're treating.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Not sure if Pine Bark Extract is safe with your meds?

Our pharmacists answer your medication & supplement questions — free.

Ask a pharmacist

Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

Pine Bark Extract label
Sources

Sources & How We Checked

Pine Bark Extract's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

The 14 references behind this product’s interaction data

Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.

Maritime Pine 14 references
  1. Rice-Evans CA, Packer L, eds. Flavonoids in Health and Disease. Manhattan, NY: Marcel Dekker, Inc., 1998.
  2. Liu FJ, Zhang YX, Lau BH. Pycnogenol enhances immune and haemopoietic functions in senescence-accelerated mice. Cell Mol Life Sci 1998;54:1168-72. PubMed
  3. Putter M, Grotemeyer KH, Wurthwein G, et al. Inhibition of smoking-induced platelet aggregation by aspirin and pycnogenol. Thromb Res 1999;95:155-61. PubMed
  4. Kohama T, Inoue M. Pycnogenol alleviates pain associated with pregnancy. Phytother Res 2006;20:232-4.
  5. Liu X, Zhou HJ, Rohdewald P. French maritime pine bark extract pycnogenol dose-dependently lowers glucose in type 2 diabetic patients (letter). Diabetes Care 2004;27:839. PubMed
  6. Liu X, Wei J, Tan F, et al. Antidiabetic effect of Pycnogenol French maritime pine bark extract in patients with diabetes type II. Life Sci 2004;75:2505-13. PubMed
  7. Wilson D, Evans M, Guthrie N et al. A randomized, double-blind, placebo-controlled exploratory study to evaluate the potential of pycnogenol for improving allergic rhinitis symptoms. Phytother Res 2010;24:1115-9.
  8. Araghi-Niknam, M., Hosseini, S., Larson, D., Rohdewald, P., and Watson, R. R. Pine bark extract reduces platelet aggregation. Integr.Med. 3-21-2000;2(2):73-77. PubMed
  9. Trebaticka, J., Kopasova, S., Hradecna, Z., Cinovsky, K., Skodacek, I., Suba, J., Muchova, J., Zitnanova, I., Waczulikova, I., Rohdewald, P., and Durackova, Z. Treatment of ADHD with French maritime pine bark extract, Pycnogenol. Eur.Child Adolesc.Psychi PubMed
  10. Suzuki, N., Uebaba, K., Kohama, T., Moniwa, N., Kanayama, N., and Koike, K. French maritime pine bark extract significantly lowers the requirement for analgesic medication in dysmenorrhea: a multicenter, randomized, double-blind, placebo-controlled study
  11. Cisar, P., Jany, R., Waczulikova, I., Sumegova, K., Muchova, J., Vojtassak, J., Durackova, Z., Lisy, M., and Rohdewald, P. Effect of pine bark extract (Pycnogenol) on symptoms of knee osteoarthritis. Phytother.Res. 2008;22(8):1087-1092.
  12. Enseleit, F., Sudano, I., Periat, D., Winnik, S., Wolfrum, M., Flammer, A. J., Frohlich, G. M., Kaiser, P., Hirt, A., Haile, S. R., Krasniqi, N., Matter, C. M., Uhlenhut, K., Hogger, P., Neidhart, M., Luscher, T. F., Ruschitzka, F., and Noll, G. Effects
  13. Schoonees, A., Visser, J., Musekiwa, A., and Volmink, J. Pycnogenol(R) (extract of French maritime pine bark) for the treatment of chronic disorders. Cochrane.Database.Syst.Rev. 2012;4:CD008294.
  14. Wang S, Tan D Zhao Y et al. The effect of pycnogenol on the microcirculation, platelet function and ischemic myocardium in patients with coronary artery diseases. Eur Bull Drug Res 1999;7:19-25.

See these in context on the Maritime Pine monograph →

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

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