Home Ingredients Rutin
Cardiovascular

Rutin

Evidence Level
Limited
2 Clinical Trials
5 Documented Benefits
2/5 Evidence Score

Rutin is a flavonoid, essentially quercetin bound to a sugar, found in buckwheat, citrus, and apples. It appears in formulas for varicose veins, easy bruising, and vein health, often alongside vitamin C or other citrus flavonoids. The controlled clinical evidence for vein symptoms is mainly for rutin derivatives such as oxerutins rather than for plain dietary rutin, which is used more for general capillary and antioxidant support. Doses commonly range from 250 to 500 mg, once or twice daily. Rutin is found naturally in foods and is generally well tolerated, though it may have a mild blood-thinning effect, so those taking anticoagulants or scheduled for surgery should check with a doctor.

Studied Dose 250-1,000 mg/day; often combined with vitamin C and other bioflavonoids
Active Compound Rutin (quercetin-3-O-rutinoside; quercetin + rutinose disaccharide)

Benefits

Capillary Strength Support (Traditional Use)

Traditionally combined with vitamin C for capillary fragility and easy bruising. The proposed mechanism is reduced capillary permeability, shared with other citrus bioflavonoids. This is historical structure-function use: there are no direct trials of plain rutin measuring bruising or bleeding outcomes.

Supported by Trial 2, Trial 1

Venous Insufficiency Adjunct

Rutin (especially as O-(beta-hydroxyethyl)-rutoside / oxerutins / Venoruton®) used for chronic venous insufficiency in Europe. The controlled venous-insufficiency evidence here is for the oxerutin derivative, not for plain dietary rutin.

Supported by Trial 1

Antioxidant Activity

Direct free radical scavenging plus quercetin-like effects after gut hydrolysis to active aglycone. Broad antioxidant profile contributing to cardiovascular and longevity applications.

Anti-Inflammatory Signals (Biomarker Only)

In laboratory models rutin reduces inflammatory cytokine signaling and NF-kB activation. The only human signal is a lower IL-6 level in one small (50-patient) diabetes trial, a biomarker rather than a measured clinical inflammatory outcome.

Supported by Trial 1, Trial 2

Use in Combination Allergy Formulas (Uncited)

Rutin is sometimes combined with luteolin and quercetin in multi-ingredient allergy and mast-cell formulas. This is combination-product use: no trial has tested plain rutin for mast-cell or allergic outcomes in people.

Supported by Trial 2, Trial 1

Mechanism of action

1

Quercetin Prodrug

Rutin is a glycoside that gets hydrolyzed by gut microbiome to release quercetin (the active aglycone) plus rutinose. Functionally a delayed-release/colon-targeted quercetin source. Bioavailability and tissue distribution differ from free quercetin.

2

Capillary Permeability Reduction

Decreases capillary leakage — improves capillary integrity. Foundational mechanism for 'bioflavonoid' applications in capillary fragility.

3

Antioxidant via Free Radical Scavenging

Direct antioxidant activity plus iron-chelating activity. Inhibits lipid peroxidation.

4

Synergy with Vitamin C

Vitamin C and rutin (and other bioflavonoids) work synergistically — flavonoids stabilize vitamin C by reducing oxidation. Basis for traditional 'vitamin C with bioflavonoids' formulations.

Clinical trials

1
Oxerutins (Hydroxyethylrutosides) for CVI: Systematic Review of a Rutin Derivative
PubMed

Multiple RCTs of hydroxyethylrutosides / oxerutins (Venoruton®) for chronic venous insufficiency.

CVI patients across multiple trials.

Oxerutins, a semi-synthetic hydroxyethyl derivative of rutin sold as Venoruton, significantly reduce CVI symptoms such as edema, pain, and leg heaviness. This evidence is for the derivative, which is absorbed differently and has different pharmacokinetics from plain dietary rutin, and it does not transfer to plain rutin.

2
Five-Flavonoid Mixture (Diosmin, Troxerutin, Rutin, Hesperidin, Quercetin) for Hemorrhoidal Bleeding
PubMed

Double-blind multicenter trial of a five-flavonoid mixture (diosmin, troxerutin, rutin, hesperidin, quercetin) versus a diosmin-based comparator mixture. No placebo arm.

154 patients with degree I to III hemorrhoidal disease.

Bleeding improved similarly in both arms (about 80 percent at 1 month) with no significant difference between the five-flavonoid mixture and the diosmin-based comparator. Rutin was one of five components and not the dominant one, so the benefit cannot be attributed to plain rutin, and there was no placebo group.

Side effects and drug interactions

Common Potential side effects

Generally well-tolerated.
Mild GI distress.
Headache rare.
Skin reactions / rash rare.
Theoretical bleeding risk at very high doses (modest).
Yellow-green urine discoloration possible (harmless).

Important Drug interactions

Anticoagulants — theoretical bleeding risk at high doses; minor.
Iron supplementation — rutin chelates iron; separate by 1-2 hours.
Hormone-sensitive conditions — theoretical phytoestrogenic effects (modest).
Pregnancy/lactation — limited supplemental safety data; dietary rutin safe.

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Frequently asked questions about Rutin

What is rutin used for?

Rutin is a flavonoid (a form of quercetin bound to a sugar) found in buckwheat, citrus, and apples. It is studied for supporting blood-vessel and capillary strength, healthy circulation, and antioxidant activity, and is used for vein and bruising support.

Does rutin help with veins or bruising?

Rutin is used to support capillary and vein health, which is why it appears in formulas for varicose veins, easy bruising, and circulation. Its antioxidant and vessel-supporting properties drive these uses.

How much rutin should I take?

Doses commonly range from about 250 to 500 mg, once or twice daily. It is often combined with vitamin C or other citrus flavonoids. Follow product labeling.

Is rutin safe?

Rutin is generally well tolerated and found naturally in foods. It may have a mild blood-thinning effect, so check with your doctor if you take anticoagulants or are scheduled for surgery.

What is Rutin?

Rutin is a flavonoid, essentially quercetin bound to a sugar, found in buckwheat, citrus, and apples. It appears in formulas for varicose veins, easy bruising, and vein health, often alongside vitamin C or other citrus flavonoids.

What is the recommended dosage of Rutin?

The clinically studied dose is 250-1,000 mg/day; often combined with vitamin C and other bioflavonoids Always follow the product label and check with a healthcare provider for personal advice.

Is Rutin safe, and does it have side effects?

For most healthy adults, Rutin is well tolerated at studied doses. Reported effects can include: Generally well-tolerated. Mild GI distress. It may also interact with some medications. Rutin is not right for everyone, so check with a healthcare provider first if you are pregnant or breastfeeding, have a medical condition, or take prescription medication.

Does Rutin interact with any medications?

Possible interactions include: Anticoagulants — theoretical bleeding risk at high doses; minor. Iron supplementation — rutin chelates iron; separate by 1-2 hours. If you take prescription medication, check with a pharmacist or doctor before using it.

How strong is the scientific evidence for Rutin?

NutraSmarts rates the evidence for Rutin as Limited (2 out of 5). It is backed by 2 clinical trials and 3 cited references summarized on this page. A higher rating reflects more, larger, and better-designed human studies.

References(3 citations)

Evidence ratings on NutraSmarts are based on the totality of human clinical research, with emphasis on randomized controlled trials, meta-analyses, and systematic reviews. The references below directly support claims made throughout this page.

  1. Aziz Z, Tang WL, Chong NJ. A systematic review of the efficacy and tolerability of hydroxyethylrutosides for improvement of the signs and symptoms of chronic venous insufficiency. J Clin Pharm Ther. 2015;40(2):177-85..PubMedUsed to support: Systematic review and meta-analysis finding that hydroxyethylrutosides (oxerutins), a semi-synthetic derivative of rutin rather than plain dietary rutin, improve the signs and symptoms of chronic venous insufficiency.
  2. Corsale I, Carrieri P, Martellucci J, Piccolomini A, Verre L, Rigutini M, Panicucci S. Flavonoid mixture (diosmin, troxerutin, rutin, hesperidin, quercetin) in the treatment of I-III degree hemorroidal disease: a double-blind multicenter prospective comparative study. Int J Colorectal Dis. 2018;33(11):1595-1600. doi: 10.1007/s00384-018-3140-5.PubMedUsed to support: Double-blind trial in 154 patients of a five-flavonoid mixture (diosmin, troxerutin, rutin, hesperidin, quercetin) versus a diosmin-based comparator for hemorrhoidal bleeding. Bleeding improved similarly in both active arms with no significant between-group difference, and there was no placebo control. Rutin was a minor component, so the result does not establish an effect of plain rutin.
  3. Bazyar H, Moradi L, Zaman F, Zare Javid A. The effects of rutin flavonoid supplement on glycemic status, lipid profile, atherogenic index of plasma, brain-derived neurotrophic factor (BDNF), some serum inflammatory, and oxidative stress factors in patients with type 2 diabetes mellitus: A double-blind, placebo-controlled trial. Phytother Res. 2023;37(1):271-284. doi: 10.1002/ptr.7611.PubMedUsed to support: Double-blind placebo-controlled trial in 50 adults with type 2 diabetes taking 500 mg/day plain rutin for 3 months. Compared with placebo, rutin improved fasting glucose, insulin resistance, LDL and triglycerides, the atherogenic index of plasma, and the inflammatory marker IL-6. These are single-center biomarker (surrogate) outcomes in a diabetic population, not measured clinical events, and a separate larger 12-week rutin trial found no effect on its metabolic endpoints, so direct plain-rutin benefits remain preliminary.