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Rutin

Also known as: Rutoside, Quercetin-3-O-rutinoside

A plant flavonoid with conflicting metabolic trial results and limited evidence behind broad antioxidant supplement claims.

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Editorial illustration

Rutin is a plant flavonoid sold in supplements. Small human trials give mixed results. One study in type 2 diabetes reported improved metabolic markers, while another in adults with overweight without diabetes found no improvement in its pancreatic-function measures. These findings leave substantial uncertainty about clinical benefit.1, 2

  • A 50-person diabetes trial tested 500 mg daily for three months and reported improvements in several glucose and lipid markers.1
  • A separate 87-person trial in overweight adults without diabetes tested 500 mg daily for 12 weeks without improving its beta-cell-function measures.2
  • In 18 healthy women, increased circulating flavonoids after supplementation did not produce an improvement in plasma antioxidant status.3

What is Rutin?

Rutin is a glycoside of quercetin. Its behavior depends on the form, dose and population studied. This guide covers isolated oral rutin, with separate attention to diabetes-related biomarkers and antioxidant testing in healthy volunteers. It does not establish a treatment regimen for diabetes.2, 3

Where it comes from

Natural sources

  • A plant-derived flavonoid glycoside related to quercetin.

How it's made

The trials used isolated rutin preparations. A food containing flavonoids provides a different exposure.

What it does in products

  • Isolated flavonoid ingredient in oral supplements

Benefits

Metabolic findings depend on the study population

limited evidence

The available trials support a cautious, population-specific reading of glucose-related claims.1, 2

The small diabetes trial reported favorable biomarker changes after 500 mg daily for three months. The 12-week trial in adults without diabetes found no benefit for beta-cell function. Different populations and endpoints prevent a direct pooled conclusion about diabetes prevention or long-term complications.

Broad antioxidant benefit remains uncertain

insufficient evidence

Absorption alone provides an incomplete basis for a health claim.3

The six-week, 18-woman trial found increased plasma flavonoids without improved plasma antioxidant status. DNA-oxidation changes occurred in both groups. It was a small biomarker study with no evidence about disease prevention.

Evidence scope and limitations

Three oral human rutin trials covering metabolic markers and antioxidant testing. This is a focused source review, not an exhaustive assessment of every flavonoid or vascular formulation.

  • The diabetes and healthy-volunteer papers were assessed through their indexed original abstracts because full-text access was unavailable.
  • Small samples, short follow-up and surrogate outcomes limit clinical conclusions. Trial populations and delivery forms differ.
  • Rare harms, pregnancy safety, comprehensive interactions and long-term disease outcomes remain unresolved by this source set.

Evidence last checked: 2026-11-12

Side effects & safety

Safety uncertainty with prolonged isolated supplementation (varies)The small healthy-volunteer trial observed no adverse blood-chemistry or liver-index changes over six weeks. Its size and duration cannot resolve uncommon or long-term harms.

Safety considerations

  • These cited trials do not establish safety in pregnancy or breastfeeding.
  • The cited evidence does not provide a comprehensive medicine-interaction assessment. People using glucose-lowering medicines need professional review before adding a supplement with reported glucose effects.
  • Not for: Rutin should not replace prescribed diabetes care on the basis of these biomarker studies.
3, 1, 4

Amounts studied & product use

These figures describe research or common product use, not a personal dose or treatment recommendation.

In supplement studies and products

The cited human trials used 500 mg daily for six weeks, 12 weeks or three months. These are research exposures in selected participants. They do not establish a generally effective or individually safe dose.

1, 2, 3

Regulatory status

  • FDA generally does not approve dietary supplements for safety and effectiveness before marketing. A rutin supplement's availability does not establish an approved diabetes or disease-prevention indication.
4

Reading a positive biomarker result

The diabetes trial measured multiple metabolic, inflammatory and oxidative-stress variables. Favorable results in that setting deserve follow-up, while its small sample leaves questions about reproducibility and clinical importance.

A reader choosing between products also needs the population and outcome. A change in a laboratory marker cannot establish fewer complications, and a null pancreatic-function result in adults without diabetes cannot answer every question about established diabetes.

1, 2

Frequently asked questions

Can results for rutin be transferred to quercetin supplements?

Rutin and quercetin are related compounds, but these trials administered particular rutin preparations. Their results alone cannot establish the effectiveness or dose of a different quercetin product.2, 3

The bottom line

Check the exact preparation, population and endpoint before treating a rutin biomarker result as a reason to supplement.

References

  1. 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. Phytotherapy Research (2023) · randomized trial · PMID 36101997; DOI 10.1002/ptr.7611; 2023 journal issue, online September 13, 2022; indexed original abstract checked, full text unavailable
  2. Mathrani A, Yip W, Sequeira-Bisson IR, et al.. Effect of a 12-Week Polyphenol Rutin Intervention on Markers of Pancreatic β-Cell Function and Gut Microbiota in Adults with Overweight without Diabetes. Nutrients (2023) · randomized trial · DOI 10.3390/nu15153360; PMID 37571297; original full text checked
  3. Boyle SP, Dobson VL, Duthie SJ, et al.. Bioavailability and efficiency of rutin as an antioxidant: a human supplementation study. European Journal of Clinical Nutrition (2000) · randomized trial · PMID 11083486; DOI 10.1038/sj.ejcn.1601090; indexed original abstract checked, full text unavailable
  4. Questions and Answers on Dietary Supplements. U.S. Food and Drug Administration · government guidance · Undated agency resource checked November 12, 2026 for premarket review, claims and professional-consultation framework

Revision history

  1. Initial AI-assisted source compilation with claim-level citations, formulation distinctions and explicit evidence limitations; not independent medical review.