Diosmin: Uses, Benefits, Dosage & Safety
Last updated: June 2026 · Reviewed by the FactoWiki Editorial Team for clarity and source accuracy
Quick summary
Diosmin is a citrus flavonoid with genuine evidence for vein problems and haemorrhoids, often combined with hesperidin. It is a widely used venous supplement in Europe.
What is Diosmin?
Diosmin is a flavonoid derived from citrus, used (often with hesperidin, as 'micronised purified flavonoid fraction') for chronic venous insufficiency and haemorrhoids.
What Diosmin is commonly used for
In supplements, Diosmin is most often included for women's bladder & urinary health, joint & bone health support. It is used as nutritional support, not as a treatment for any medical condition — the distinction matters, because the claims on a sales page are often stronger than the evidence allows.
How Diosmin works
Diosmin is thought to improve vein tone, reduce inflammation and capillary leakage, and support lymph flow, the basis for its use in leg-vein symptoms and haemorrhoids.
What the evidence says
Here's an honest snapshot of what published research suggests about Diosmin — including where the evidence is limited.
- Diosmin (especially the micronised diosmin-hesperidin combination) has reasonable evidence for reducing symptoms of chronic venous insufficiency and acute haemorrhoid flares, and is used medically in several countries.
- Study quality and doses vary, and a result seen in research doesn't guarantee the same for any individual — use the sources below to check the current evidence on Diosmin rather than relying on marketing claims.
Typical dosage used in studies
Studies commonly use around 450–500 mg diosmin with 50 mg hesperidin once or twice daily. This is general information from research, not a personal recommendation or a dosing instruction.
Side effects and safety
Diosmin is generally well tolerated, with occasional digestive upset; safety data in pregnancy are limited, so use is best discussed with a doctor. As with any supplement, it's sensible to introduce Diosmin on its own, use a trusted brand, and stop if you notice any reaction.
Medication interactions and who should avoid Diosmin
Medication & safety check
Diosmin can interact with certain medications or health conditions in ways that aren't always obvious. If you take any regular medication, are pregnant or breastfeeding, or manage a health condition, confirm Diosmin is appropriate for you before starting.
This is general information, not personal medical advice. If you take any medication, are pregnant or breastfeeding, or have a health condition, confirm it's safe to use Diosmin with your doctor or pharmacist first.
Sources & further reading
For authoritative background and the current research base on Diosmin, consult:
- PubMed — search the research on Diosmin
- NIH Office of Dietary Supplements
- NCCIH — National Center for Complementary and Integrative Health
- MedlinePlus — drugs, herbs & supplements
Frequently asked questions
Does Diosmin actually work?
Diosmin (especially the micronised diosmin-hesperidin combination) has reasonable evidence for reducing symptoms of chronic venous insufficiency and acute haemorrhoid flares, and is used medically in several countries. As with most supplements, results vary between people and the marketing is often stronger than the evidence — so it's worth checking the research before relying on it.
Is Diosmin safe to take?
For most healthy adults at normal doses it's generally well tolerated, but there are real cautions. Diosmin is generally well tolerated, with occasional digestive upset; safety data in pregnancy are limited, so use is best discussed with a doctor. If you take medication, are pregnant or breastfeeding, or have a health condition, check with a doctor or pharmacist first.
What is Diosmin used for?
In supplements, Diosmin is mainly included for women's bladder & urinary health, joint & bone health support — as nutritional support, not as a treatment for any medical condition.
Where you'll find Diosmin
On FactoWiki, Diosmin is the kind of ingredient you'll see discussed in these supplement categories. Each category guide breaks down what the evidence does and doesn't support.
Related ingredients to explore
Ingredients often studied or formulated alongside Diosmin — useful for understanding the full picture of a formula.