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Rutin / Oxerutins (Hydroxyethylrutosides)
A flavonoid (rutin) whose semi-synthetic derivatives — hydroxyethylrutosides/oxerutins (Venoruton) — have meta-analysis evidence for modestly improving chronic venous insufficiency symptoms. Most evidence is for the rutoside derivative, not plain rutin.
What the evidence says
Most Rutin studies are mechanism or observational rather than RCTs that measure a clinical effect — keep findings provisional.
Most evidence is from high-quality meta-analyses and randomised trials published 1982–2026 with a typical study size of 136 participants.
Based on 63 studies · 3 meta-analyses · 57 RCTs · 226 total participants
Confidence
High confidenceBy outcome
A 15-trial meta-analysis shows hydroxyethylrutosides modestly improve chronic-venous-insufficiency symptoms, but the evidence is for rutoside derivatives, not plain rutin, capping it at moderate.
69 rigorous studies
61 randomized trials · 5 meta-analyses · 3 systematic reviews
Our evidence rating for Rutin is accountable to this entire body of rigorous research indexed in PubMed — not a hand-picked subset.
PubMed · as of Jul 2026
13 trials ongoing or recruiting · 35 completed on ClinicalTrials.gov
Registered trials show research momentum for Rutin, not proof of effect — a registration is a plan, and posted results are sponsor-reported, not peer-reviewed. They are never counted toward the evidence rating above.
Browse these trials on ClinicalTrials.govClinicalTrials.gov · as of Sep 2026
Under EU law (Reg. 1924/2006), EFSA reviews whether a specific health claim for Rutin meets the evidence standard. These are independent regulatory decisions on claims — not studies, and never counted toward the evidence score above.
Not authorised by EFSA
“Coldizin helps support the immune system”
“Rutoside Helps to maintain capillary integrity”
“Troxerutin Contributes to the normal functioning of the veins”
“Rutin A strong antioxidant that protects the body’s cells from the harmful effects of free radicals; Improves the immune system”
“Rutin Promotes the functioning of blood vessels (arteries, veins, capillaries), normalizes penetrability, health and elasticity of the blood vessel walls”
“Not authorised” means the specific claim wording did not meet the EU’s evidence standard — often a matter of dossier or phrasing, not proof of no effect. EFSA judges marketing claims and is kept separate from our study-based evidence score.
Source: EU Register of nutrition and health claims (European Commission / EFSA) · register snapshot Feb 2013
Rutin is a flavonoid (quercetin-3-O-rutinoside) found in buckwheat, citrus, and other plants. Its venoactive use is best supported in the form of hydroxyethylrutosides (oxerutins / troxerutin; brand Venoruton) — semi-synthetic derivatives that improve capillary resistance and reduce venous edema.
A meta-analysis of 15 trials found modest improvements in chronic-venous-insufficiency symptoms (swelling, aching, restless legs). The honest caveat: nearly all clinical evidence is for the rutoside DERIVATIVES, not plain dietary rutin, which is far less studied.
Like other venoactives, it relieves symptoms and is an adjunct to compression therapy.
Rutosides strengthen capillary walls and reduce permeability, limiting fluid leakage.
Flavonoid antioxidant activity reduces oxidative/inflammatory venous-wall changes.
How Rutin works — from molecular targets to health outcomes. Click an edge to see supporting research.This visualization is in beta — pathways are being refined and expanded.
Limited data — use only if advised.
Flavonoids may have mild antiplatelet activity — theoretical additive effect at high doses.
Tip: Take with food
Tip: Reduce dose
Rutin has an evidence score of 5/10 — moderate evidence based on 22 indexed studies, including 1 meta-analysis. A flavonoid (rutin) whose semi-synthetic derivatives — hydroxyethylrutosides/oxerutins (Venoruton) — have meta-analysis evidence for modestly improving chronic venous insufficiency symptoms. Most evidence is for the rutoside derivative, not plain rutin. Representative study: PMID 25630350.
The commonly studied dose of Rutin is Oxerutins (Venoruton) ~1000mg daily; plain rutin products vary widely. Individual needs vary — start at the lower end of the range and adjust based on how you respond.
The best time to take Rutin is with meals. Take it with food. Taken with food; consistency over weeks for edema relief.
Rutin is generally well-tolerated and considered safe for most healthy adults at recommended doses. Reported side effects are uncommon and include mild GI upset, headache/flushing. Use caution if any of these apply to you: Pregnancy/breastfeeding (limited data); Allergy to rutin/flavonoids.
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Reviewed by Dr. Baher Al Hakim · Last reviewed June 2026 · evidence from 63 studies · how we score · editorial policy
This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.
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