Net Contents
180 Capsule(s)
Serving Size
2 Capsule(s)
Servings Per Container
90
Supplement Form
Capsule
Bar Code (UPC/SKU)
0 46985 00116 8
Product Version
R0323
Label Analysis
Objective insights generated automatically from the official DSLD label — a quick, factual read of how this product is formulated and disclosed.
3 distinct active ingredients are disclosed in Supplement Facts.
Every active ingredient discloses a specific amount per serving.
2 ingredients report a %DV; 2 meet or exceed 100% DV.
This analysis is generated algorithmically from label data for educational reference only. It is not a product endorsement, ranking, or medical advice.
Supplement Facts
Serving Size: 2 Capsule(s) · 1 per day
| Ingredient | Amount Per Serving | % Daily Value |
|---|---|---|
| Vitamin C(Ascorbic Acid) | 200 mg | 222% |
| Zinc(Zinc Oxide) | 11 mg | 100% |
| Quercetin Dihydrate(Sophora japonica Bud Extract) | 750 mg | — |
Not Present
Other Ingredients
Target Groups
Label Claims
Directions & Suggested Use
Suggested/Recommended/Usage/Directions
Suggested use: Adults take 2 capsules daily or as directed by a doctor.
Warnings & Precautions
Precautions re: Children
Warning: Keep out of reach of children.
Precautions re: Pregnant or Nursing or Prescription Medications
If pregnant or breastfeeding, or if you have a medical condition, or if taking any medications or other supplements, consult a health professional before use.
Precautions re: All Other
Safety sealed for your protection.
Formulation
Formulation re: Other
Immune support
Formula re: Contains
750 mg Quercetin 200 mg of vitamin C, 11 mg zinc in each serving
FDA Statements
FDA Disclaimer Statement
This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent disease.
FDA Statement of Identity
Dietary supplement
Manufacturer & Distributor
Distributor
Quantum Health
PO Box 2791, Eugene, OR, 97402
800-448-1448
Market Reference
Quantum Health Quercetin 500mg
Vitacost.com4.9(22)$24.03
Bluebonnet Nutrition Bluebonnet Super Quercetin
Natures Food Markets4.8(304)$15.79
SuperSmart Super Quercetin 1000mg
Nordstrom4.4(46)$45.00
Walgreens Quercetin Plus Zinc Capsules
Walgreens.com$19.99
NOW Quercetin 500 mg
Walmart - iHerb4.8(1300)$23.25
Quantum Health 30 Capsules
Instacart5.0(2)$9.99
Solaray QBC Plex 60 Capsules
Meijer4.8(451)$22.99
Super Quercetin
Icon Muscle$19.99
Where to Buy Locally
Enter your city or ZIP code to find supplement & health stores in your area that may carry this product.
Showing representative supplement & health retailers — search above for stores in your area.
The Vitamin Shoppe
4.5 (217)Vitamin & supplements store
195 Harbison Blvd, Columbia, SC 29212
Garner's Natural Life - Lexington
4.9 (53)Vitamin & supplements store
5166 Sunset Blvd Ste c, Lexington, SC 29072
Spotters Sports Nutrition
4.5 (50)Vitamin & supplements store
205 Columbia Ave, Lexington, SC 29072
Nutrition Warehouse
4.8 (36)Vitamin & supplements store
422 Bush River Rd #4, Columbia, SC 29210
The Vitamin Shoppe
4.7 (110)Vitamin & supplements store
5449 Sunset Blvd, Lexington, SC 29072
Nutrition Warehouse
5.0 (25)Vitamin & supplements store
10 Quality Ct, Columbia, SC 29229
14 Carrot Whole Foods
4.5 (269)Vitamin & supplements store
5300 Sunset Blvd, Lexington, SC 29072
Your CBD Store | SUNMED - Irmo, SC
4.9 (244)Vitamin & supplements store
275 Harbison Blvd Ste L, Columbia, SC 29212
Research & Studies
Co‐encapsulation of biodegradable nanoparticles with silicon quantum dots and quercetin for monitored delivery
Q Wang, Y Bao, J Ahire, Y Chao - Advanced healthcare …, 2013 - Wiley Online Library
… of quercetin and fluorescent Silicon quantum dots (SiQDs) in … to improve the biocompatibility of quercetin. Fluorescent imaging … HepG2 cells are incubated with quercetin and SiQDs dual-…
201393 citationsFormulation of double nanoemulsions based on pH-sensitive carboxymethyl cellulose/Starch copper doped carbon quantum dots for quercetin controlled release
M Najafi, M Pourmadadi, M Abdous, A Rahdar… - Journal of Molecular …, 2024 - Elsevier
… Quercetin (QC), a potent flavonoid with potential therapeutic applications, faces challenges due to its hydrophobic nature and poor solubility. This approach presents a novel approach …
202454 citationsDevelopment and assessment of polyacrylamide-starch hydrogel nanocomposites with graphene quantum dots for targeted quercetin delivery to brain tumors
P Ordoukhani, M Pourmadadi, M Abdouss - … Polymer Technologies and …, 2025 - Elsevier
Brain carcinoma remains among the most challenging cancers to treat due to the restrictive blood-brain barrier (BBB), which limits drug bioavailability and durability. Quercetin (QC), a …
20258 citationsFrom phytomedicine to photomedicine: quercetin-derived carbon nanodots—synthesis, characterization and healthcare applications
GG Naik, R Pratap, D Mohapatra, S Shreya… - Journal of Materials …, 2023 - Springer
… This study focused on the quercetin-derived CNDs as a drug nanocarrier for … “quercetin’ and explored for various healthcare and environmental applications. The quercetin-derived …
202310 citationsConstruction of chitosan carbon dot/quercetin composite nanosystem with enhanced antioxidant properties
G Wu, F Wen, L Huo, P Li - Nano, 2026 - World Scientific
… through a hydrothermal method, ultimately forming chitosan carbon quantum dot carriers (CS-CDs) with an average size of 6.27 nm. Quercetin (Que) was then loaded onto these …
20261 citationsSynthesis, characterization, and in vitro analysis of a chitosan/gamma alumina/graphene quantum dots/bio-hydrogel for quercetin delivery to lung cancer cells
MH Karami, M Pourmadadi, M Abdouss, MR Kalaee - Bionanoscience, 2025 - Springer
… γ-Al 2 O 3 ), and graphene quantum dots (GQDs) were synthesized using double nanoemulsion techniques for the release of quercetin (QUE). The hydrogel nanocarriers, comprising of …
202526 citations
Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2025-02-23. DSLD Label ID: 320543. This information is provided for educational reference only and is not medical advice. Always follow the product label and consult a doctor or pharmacist before use.
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