100/100

This product looks safe

No ingredients exceed tolerable upper intake levels
Limited research evidence available for ingredients

B Label Compliance Grade

Label

Product Label

Open Full PDF View on NIH DSLD →

Details

Label Data

1 Tablet(s)

Serving Size

Servings

Other Combinations

Product Type

Evidence Coverage

Ingredients

Supplement Facts — Evidence Check

Vitamin C

1000 mg (1110% DV)

In a base that contains

64 mg

Other Ingredients

Microcrystalline Cellulose Stearic Acid Croscarmellose Sodium Vegetable Magnesium Stearate Silicon Dioxide natural Caramel color Pharmaceutical Glaze Magnesium Silicate

Claims

Label Claims — Verification

Unverified Nutrient

Unverified All Other

Unverified Structure/Function

Info

Product Information

Directions for Use

Directions: Adults - Take one tablet daily, preferably with food, as a dietary supplement.

Warnings & Precautions

Caution: If you are pregnant, nursing, taking any medications or have any medical condition, consult your physician before use.

Discontinue use and consult your physician if any adverse reactions occur.

Keep out of reach of children.

Tamper-Evident Seal: Do not use product if seal appears tampered.

Formulation Notes

Antioxdant & immune health support

Guaranteed no added: Sugar, Starch, Yeast, Soy, Wheat, Dairy, Gluten, Fish, Tree Nuts, Peanuts, Egg, Fragrance, Artificial Flavors, Preservatives, Animal Products, Crustacean Shellfish. Sodium Free.

Gluten free Soy free

Additional Information

Mason Guarantee Laboratory tested cGMP Certified Good Manufacturing Practice

N Mason Natural Est. 1967

Store in a dry place under controlled room temperature: 20 degrees - 25 degrees C (68 degrees - 77 degrees F).

Please recycle

Metadata

Product Details

UPC / SKU3 11845 11735 9

DSLD Entry Date2021-03-25

Product TypeOther Combinations

FormTablet or Pill

BrandMason Natural

DSLD ID244639

Data Updated2026-04-11

Research

Research Evidence

184

Research Sources

Avg Quality

Systematic Review

Meta Analysis

Rct

Clinical Trial

Cochrane Review

Openfda Safety

B Treatment of gouty arthritis with traditional Chinese medicine decoction: Meta-analysis, network pharmacology analysis, and molecular docking

Meta Analysis Medicine 2024 PubMed DOI

B Effects of quercetin supplementation on lipid profile: A systematic review and meta-analysis of randomized controlled trials

Meta Analysis Critical reviews in food science and nutrition 2017 PubMed

B Dietary polyphenols and the risk of metabolic syndrome: a systematic review and meta-analysis

Meta Analysis BMC endocrine disorders 2024 PubMed DOI

B Quercetin and endurance exercise capacity: a systematic review and meta-analysis

Meta Analysis Medicine and science in sports and exercise 2011 PubMed DOI

B Dietary flavonoid intake and smoking-related cancer risk: a meta-analysis

Meta Analysis PloS one 2013 PubMed DOI

B Clinical efficacy evaluation and potential mechanism prediction on Guizhi-Shaoyao-Zhimu decoction in the treatment of gouty arthritis based on meta-analysis, network pharmacology analysis, and molecular docking

Meta Analysis Medicine 2023 PubMed DOI

B A Systematic Review: Quercetin-Secondary Metabolite of the Flavonol Class, with Multiple Health Benefits and Low Bioavailability

Systematic Review International journal of molecular sciences 2024 PubMed DOI

B Dietary flavonoid for preventing colorectal neoplasms.

Cochrane Review The Cochrane database of systematic reviews PubMed DOI

B Flavonoids for treating venous leg ulcers.

Cochrane Review The Cochrane database of systematic reviews PubMed DOI

B The effects of quercetin supplementation on lipid profiles and inflammatory markers among patients with metabolic syndrome and related disorders: A systematic review and meta-analysis of randomized controlled trials

Meta Analysis Critical reviews in food science and nutrition 2020 PubMed DOI

View all evidence for Quercetin →

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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.