-
DE
Quercetin Daily Dose: Recommendations & Effects
The quercetin daily dose refers to the recommended amount of the plant-derived flavonoid quercetin to be taken each day to achieve meaningful health benefits.
Add as Preferred SourceThings worth knowing about "Quercetin Daily Dose"
The quercetin daily dose refers to the recommended amount of the plant-derived flavonoid quercetin to be taken each day to achieve meaningful health benefits.
What Is Quercetin?
Quercetin is a naturally occurring plant pigment belonging to the flavonoid group, found in many fruits and vegetables. It is a potent antioxidant with well-documented anti-inflammatory, antiviral, and immune-modulating properties. As a dietary supplement, quercetin is widely used to support immune function, relieve allergy symptoms, and promote cardiovascular health.
Natural Sources of Quercetin
Quercetin is found in a wide variety of plant-based foods. The richest dietary sources include:
- Onions (especially red onions)
- Capers (the highest known concentration)
- Apples (with skin)
- Broccoli
- Berries (e.g., blueberries, cranberries)
- Green and black tea
- Red wine
Through a balanced diet, an average adult consumes approximately 10 to 100 mg of quercetin per day.
Recommended Quercetin Daily Dose
There is currently no officially established daily intake value for quercetin from regulatory bodies such as the WHO or EFSA (European Food Safety Authority). Dosages used in clinical studies and expert recommendations vary depending on the intended purpose:
- General antioxidant support: 250–500 mg per day
- Anti-inflammatory and immune support: 500–1000 mg per day
- Allergy relief: 200–400 mg, two to three times daily
- Cardiovascular health: 150–500 mg per day
Most clinical trials report that daily doses between 500 mg and 1000 mg are effective and well tolerated. Higher doses of up to 3000 mg per day have been investigated in some studies but should only be taken under medical supervision.
Bioavailability and Intake Recommendations
In its pure form, quercetin has relatively low bioavailability, meaning the body can only absorb a limited amount. Several strategies are used to improve absorption:
- Quercetin phytosome: Quercetin bound to phosphatidylcholine, which significantly enhances absorption.
- Combination with bromelain or vitamin C: These combinations are common in supplements and may enhance the overall effect.
- Taking with a fatty meal: Dietary fat supports the absorption of the fat-soluble components of quercetin.
It is generally recommended to take quercetin supplements with meals to improve tolerability and optimize absorption.
Side Effects and Safety
Quercetin is considered safe and well tolerated at standard doses of up to approximately 1000 mg per day. At higher doses, the following side effects have occasionally been reported:
- Headaches
- Tingling sensations in the extremities
- Stomach irritation or nausea
- At very high doses: potential stress on the kidneys
People with kidney disease, pregnant women, and breastfeeding mothers should only take quercetin supplements after consulting a healthcare professional.
Interactions with Medications
Quercetin may interact with certain medications. Known interactions include:
- Antibiotics: Quercetin may interfere with the activity of certain antibiotics, particularly quinolones.
- Blood thinners (e.g., warfarin): Quercetin may potentially enhance the effect of anticoagulants.
- Cyclosporine and other immunosuppressants: Quercetin may affect the metabolism of these drugs.
- CYP3A4 enzyme substrates: Quercetin inhibits this liver enzyme, potentially slowing the breakdown of various medications.
Anyone taking prescription medications is strongly advised to consult a doctor before starting quercetin supplementation.
References
- Mlcek J. et al. - Quercetin and Its Anti-Allergic Immune Response. Molecules, 2016. Available at: https://pubmed.ncbi.nlm.nih.gov/27187333/
- Anand David AV et al. - Overviews of Biological Importance of Quercetin: A Bioactive Flavonoid. Pharmacognosy Reviews, 2016. Available at: https://pubmed.ncbi.nlm.nih.gov/27041870/
- European Food Safety Authority (EFSA) - Scientific Opinion on the safety of quercetin as a food supplement. EFSA Journal, 2011. Available at: https://efsa.onlinelibrary.wiley.com/doi/10.2903/j.efsa.2011.2279
Building Blocks for a Healthy Life
As an integrated manufacturer, we develop & produce evidence-based, patented, and non-patented formulations. We work exclusively with plant and natural extracts according to the strictest purity & quality standards.
The combination of science & modern technology with the laws of nature creates solutions consistently tailored to humans – for the highest good: health.
Skip product gallery
Subscription available
Floral
For Healthy Oral Flora & Dental Care
Formulated lozenges with Dentalac®, lactic acid bacteria, and Lactoferrin CLN®30 lozenges
Regular price:
22,90 €
Discount
Subscription available
Lactoferrin 60 Capsules
For your universal protection
As one of the most valuable proteins in the body, lactoferrin is a natural component of the immune system.
60 Capsules
Sale price:
50,00 €
Regular price:
59,90 €
Discount
Subscription available
Multivitamin Mineral Complex
Daily basic supply: the complete spectrum of micronutrients
Natural multivitamin complex for the immune system, energy, and central body functions
30 Capsules
Sale price:
27,90 €
Regular price:
29,90 €
Subscription available
Natural Iron
For your iron balance
Specially formulated for your iron balance with plant-based curry leaf iron, Lactoferrin CLN®, and natural Vitamin C from rose hips.
30 Capsules
Regular price:
35,90 €
Most read entries
3 Posts in this encyclopedia categoryMagnesiumcarbonat
Magnesiumcarbonat ist eine anorganische Magnesiumverbindung mit säure-neutralisierender (antazidischer) Wirkung. Erfahre mehr über Vorteile, Einsatzgebiete und Unterschiede zu besser resorbierbaren Magnesiumformen.
Calorie content
The choice of food influences our energy intake. The calorie content varies greatly - some provide little energy, others a lot.
Cologne list
The Cologne List ® is an important initiative in competitive sports that offers athletes guidance in the selection of nutritional supplements.