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Product Review

Thorne Quercetin Phytosome

Thorne · Capsule · 250 mg

Price/day

€0.87

Dose

250 mg

Servings/pack

60

Pack price

€52.00

NSF Certified

Transparency Index

8.1/10

Recommended Bioavailability-focused formulation using phytosome technology, backed by the manufacturer's sport certifications.

Rating breakdown

Evidence for ingredient 7.0/10

Quercetin has growing human study data on inflammation and senolysis, but the overall evidence base remains moderate.

Value for money 6.0/10

€0.87 per day is above powder products, but reflects a high-quality formulation.

Product quality 9.0/10

Phytosome raw material from Indena; Thorne manufactures under GMP with strict internal testing.

Label honesty 9.0/10

Full disclosure of excipients, batch, and allergens; no unsubstantiated health claims.

Third-party testing 8.0/10

NSF Sport program tests Thorne ingredients for contamination.

Product Description

Thorne binds quercetin to phospholipids (phytosome), significantly improving gut and lymph absorption. Each capsule delivers 250 mg pure active compound with no colorants.

What We Like

  • Phytosome technology with Indena-sourced, Meriva-like absorption profile
  • Transparent ingredient sourcing, gluten- and soy-free
  • Capsule formulation supports prolonged active levels

What We’re Missing

  • Relatively high cost per mg compared to powder or bulk quercetin
  • No added synergy with vitamin C or bromelain

Usage Recommendation

1 capsule with a fat-containing meal; optionally split into two servings per day when inflammation markers are elevated.

Ingredient dossier

Quercetin is a plant flavonoid with antioxidant and senolytic potential. Human senolytic evidence is limited to tiny pilot studies using Dasatinib+Quercetin combined — not quercetin alone.

Read full dossier: Quercetin →