White bottle of Thorne Quercetin Phytosome dietary supplement, featuring a modern abstract design with pink, red, and black splashes. The label indicates it contains 60 capsules. White plastic supplement bottle with a label showing Supplement Facts, listing Quercetin Phytosome 250 mg per capsule and other ingredients. Text includes a disclaimer and manufacturer information for Thorne Research, Inc. A white supplement bottle with a label showing icons and text for respiratory support and foundational benefits, usage instructions, tamper evident warning, and a gluten free icon at the bottom. A white bottle labeled Thorne Quercetin Phytosome Dietary Supplement sits on a white surface with a single capsule and two green leaves crossed beneath it. Text on a green background about 3,000 banned ingredients and a higher standard for home products.
White bottle of Thorne Quercetin Phytosome dietary supplement, featuring a modern abstract design with pink, red, and black splashes. The label indicates it contains 60 capsules.

Thorne Quercetin Phytosome

60 count

Why we love it

  • Free from 3,000+ banned ingredients and meets our EU-informed standards.
  • Supports various types of immune cells that are necessary for an optimized immune response.*.
  • Benefits allergy sufferers by helping to regulate histamine release.*.
  • A key nutrient to support healthy aging.*.
  • Quercetin phytosome complex is 20-times better absorbed that quercetin alone, providing maximum benefit from a smaller amount.
Purchase options

Quercetin Phytosome $46.00

Free carbon neutral shipping on orders $29+. Arrives in 3–5 days. Free, easy 30-day returns.

Give your immune system an advantage with the optimized antioxidant support of quercetin.*

As a powerhouse antioxidant, Quercetin Phytosome benefits an optimized immune response, offers support for allergy sufferers, and promotes a healthy aging process for well-rounded daily wellness support.*

*Note: These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease. Consult your physician before adding a dietary supplement to your diet.

One Capsule Contains:

  • Quercetin Phytosome (Sophora japonica extract (flower) / Phospholipid complex from Sunflower) 250 mg.

Other Ingredients: Leucine, Microcrystalline Cellulose, Hypromellose (derived from cellulose) capsule, Silicon Dioxide.

Take 1 capsule two to three times daily with meals or as recommended by your health-care practitioner.

Grove Values

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Wellness, proven and transparent

Thorne began with a biochemist’s vision: supplements should be grounded in clinical research and ingredient integrity. Every formula is made without unnecessary additives, using carefully sourced ingredients that are fully disclosed and traceable. Third-party testing and NSF Certified for Sport® standards ensure each supplement meets the highest bar for families who want to know exactly what they’re putting in their bodies.

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3,000+ BANNED INGREDIENTS

Wellness formulas you can trust.

Every wellness product is reviewed by experts and screened for ingredients and materials that align with Grove’s strict standards — so you can feel good about what you and your family rely on to feel your best.

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Vetted for ingredient integrity

No artificial colors, flavors, or phthalates — all common in mainstream products

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No unnecessary extras

Free from artificial dyes, talc, titanium dioxide, and magnesium stearate

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Less plastic, fewer microplastics

Prioritized packaging options that reduce plastic waste and microplastic exposure

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Go Beyond Plastic™ and microplastics.

Plastic products break down into microplastics that can affect human health.

Grove Co. is on a mission to reduce plastic in home essentials — for both people and for the planet.

Learn more on the Home Planet blog

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