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Dietary supplement

Pine Bark Extract 95% Proanthocyanidins Ingredients & Drug Interactions

by Hard Rhino

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

Pine Bark Extract 95% Proanthocyanidins is a dietary supplement by Hard Rhino with 1 active ingredient. 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 95% Proanthocyanidins by Hard Rhino

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 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.

This product contains one active ingredient: maritime pine bark extract standardized to 95% proanthocyanidins. Proanthocyanidins are plant compounds with antioxidant properties.

The product is a powder with no other inactive ingredients listed.

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

This product doesn't appear to be marketed for a specific use, so we graded Maritime Pine's overall clinical evidence instead.

Moderate

Some clinical evidence supports Maritime Pine for:

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.
  • Since the label doesn't commit to one use, we graded the ingredient's overall clinical evidence instead.
  • On file: Asthma — rated "Possibly Effective" (Natural Medicines).
  • On file: Chronic venous insufficiency (CVI) — rated "Possibly Effective" (Natural Medicines).
  • On file: Osteoarthritis — rated "Possibly Effective" (Natural Medicines).

Pine bark extract has Possibly Effective ratings for osteoarthritis and chronic venous insufficiency (a condition where blood doesn't return well from the legs). It's rated Possibly Ineffective for high cholesterol.

The evidence for asthma is listed as Possibly Effective, though it's generally not a first-line treatment. Keep in mind these ratings mean the evidence is suggestive but not conclusive—more research would help clarify how well it works.

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 data isn't fully established. The most common side effects reported are gastrointestinal complaints, dizziness, and vertigo.

Headache and a single case of chest pain have also been reported, though the chest pain occurred in a patient with a history of heart problems and may not have been directly caused by the extract. There isn't enough safety data during pregnancy or breastfeeding, so it's best to avoid it at those times.

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.

Before taking this product, check with your pharmacist if you're on blood thinners or antiplatelet drugs—pine bark extract may increase bleeding risk (Moderate severity). Also double-check if you take diabetes medications or immunosuppressants, as the extract may affect how those work.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with some supporting evidence behind its ingredients' uses. Moderate medication interactions have been identified, and safety information is well characterized.

This extract may help with osteoarthritis or venous leg symptoms if you're looking for a possibly effective option. If you take blood thinners, diabetes drugs, or immunosuppressants, you'll need to check with your pharmacist first—the interaction risks are real.

Talk to us before starting, especially if you're pregnant, breastfeeding, or on any prescription medications.

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

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Mar 24, 2017.

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 95% Proanthocyanidins, straight from the product label.

Brand Hard Rhino
Barcode (UPC) 798711500383
Net contents 5 kg; 11 lbs
Market status On market
Date entered into DSLD Mar 24, 2017
DSLD ID 72198
Product type Botanical
Supplement form Powder
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), No Allergies, Gluten Free, Dairy 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 95% Proanthocyanidins by Hard Rhino, 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:
0.25 Gram(s)
Maximum serving Sizes:
0.25 Gram(s)
Servings per container
20000
UPC/BARCODE
798711500383
IngredientAmount% DV
Pine bark extract250 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.
Formulation

-Non-GMO -Gluten free -Allergen free

Allergens: This product contains no soy, dairy, dairy byproducts, eggs, shellfish, wheat, gluten, tree nuts, or sesame seeds.

General Statements

Bulk pail - Best value - Scoop inside - 20000 servings

Suggested/Recommended/Usage/Directions

Suggested Use: As a dietary supplement, take 1 leveled scoop (~250 mg) mixed with 6-8 ounces of water or suitable beverage. Taken once daily, preferably with meals or as directed by a qualified health professional. A micro scale is recommended to ensure accurate and precise measurements.

FDA Disclaimer Statement

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

Precautions

Warning: Keep out of the reach of children. Do not take this or any other supplement if under the age of 18, pregnant or nursing a baby, or if you have any known or suspected medical conditions and/or taking prescription drug(s) or OTC medication(s).

Do not take this or any other supplement if under the age of 18, pregnant or nursing a baby, or if you have any known or suspected medical conditions and/or taking prescription drug(s) or OTC medication(s).

Always consult with a qualified health physician before taking any new dietary supplement.

Do not use or consume if seal is broken.

FDA Statement of Identity

Dietary Supplement

Storage

Storage: Store in a cool, dry place. Re-seal inner bag immediately after use to preserve freshness.

See for yourself

Pine Bark Extract 95% Proanthocyanidins by Hard Rhino label

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

What’s inside

The Ingredients in Pine Bark Extract 95% Proanthocyanidins by Hard Rhino

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size0.25 Gram(s) Dosage formPowder Servings per container20000 Amounts shown are per serving.

Pine bark extract

Interacts with
327 drugs
250 mg per serving Form: Proanthocyanidins

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

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

Interaction report

Pine Bark Extract 95% Proanthocyanidins by Hard Rhino Drug Interactions

Want to check YOUR meds against Pine Bark Extract 95% Proanthocyanidins?

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 95% Proanthocyanidins 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 95% Proanthocyanidins, from the product label.

Hard Rhino

See all Hard Rhino products
Name
Guardian Wholesale
City
Phoenix
State
AZ
ZipCode
85085
Phone Number
(866)961-8378
Web Address
HardRhino.com
Pharmacist Counseling Corner

Pine Bark Extract 95% Proanthocyanidins by Hard Rhino: Common Questions

Does Pine Bark Extract 95% Proanthocyanidins by Hard Rhino interact with any medications?
Yes. Based on its ingredients, Pine Bark Extract 95% Proanthocyanidins 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 95% Proanthocyanidins contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism 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?
Pine bark extract is rated Possibly Effective for osteoarthritis, which means some clinical evidence supports it, but it's not a proven cure. It may help reduce symptoms for some people. Talk with your doctor about whether it fits your treatment plan.
Can I take this if I'm pregnant or nursing?
There isn't enough safety data for pregnancy or breastfeeding, so it's best to avoid it during those times. If you're planning pregnancy or are breastfeeding, check with your pharmacist or doctor before taking this supplement.
What are the most common side effects?
The most common side effects are gastrointestinal complaints, dizziness, and vertigo. Headache has also been reported. Most people tolerate it well, but these effects have been seen in clinical studies.
Is this safe long-term?
Pine bark extract is generally well tolerated in studies, but long-term safety hasn't been fully established yet. If you're thinking about using it regularly over months or years, that's a good conversation to have with your pharmacist.
What's proanthocyanidin, and why is it in here?
Proanthocyanidins are natural plant compounds with antioxidant properties found in pine bark. The extract is standardized to 95% proanthocyanidins to ensure consistent strength and quality from batch to batch.
Does this work for high cholesterol?
Pine bark extract is rated Possibly Ineffective for high cholesterol based on available evidence. If you're looking to manage cholesterol, this probably isn't the right choice—talk to your doctor about proven options.

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

Not sure if Pine Bark Extract 95% Proanthocyanidins is safe with your meds?

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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 95% Proanthocyanidins label
Go deeper

The Full Monographs Behind Pine Bark Extract 95% Proanthocyanidins’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Sources

Sources & How We Checked

Pine Bark Extract 95% Proanthocyanidins'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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