Home/ Supplements/ Quercetin/ Ester-C 500 Plus Bioflavonoids

Ester-C 500 Plus Bioflavonoids

product on market Other (e.g. tea bag) Bluebonnet Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 17% of ingredients have research evidence
B Label Compliance Grade

What the Evidence Says

✨ AI-generated · Qwen 3.6 · methodology

Vitamin C and citrus bioflavonoids are supported by strong evidence for their roles in antioxidant protection and immune function. Calcium is well-established for maintaining bone density and supporting neuromuscular health. Research indicates these ingredients are generally safe and effective when used as directed.

AI-generated summary based on research evidence. Not medical advice.

Label

Product Label

Label for Ester-C 500 Plus Bioflavonoids
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Caplet(s)
Serving Size
Other Combinations
Product Type
17%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Vitamin C
500 mg (833% DV)
Calcium
50 mg (5% DV)
Market median: 500.0mg (283 products) 174 studies (A:0, B:62)
Flavonols
63 mg
Flavones
8 mg

Other Ingredients

Vegetable Cellulose Stearic Acid Magnesium Stearate Silica Vegetable Glaze
Claims

Label Claims — Verification

Unverified Nutrient
Unverified All Other
Info

Product Information

Directions for Use

Directions: As a dietary supplement take one caplet daily or as directed.

Formulation Notes

Bluebonnet's Ester-C 500 mg. Plus Bioflavonoids caplets contain buffered Ester-C plus citrus bioflavonoids from fresh oranges, lemons, tangerines, grapefruits and limes. Also providing hesperidin and other flavonols.

Free of milk, egg, fish, crustacean shellfish, tree nuts, peanuts, wheat and soybeans. Also free of yeast, gluten, barley, rice, sodium and sugar.

Bluebonnet's KOF-K Kosher certification #K-0000700

High potency Vitamin C

Additional Information

Available in easy-to-swallow caplets for maximum assimilation and absorption.

K Parve

Metadata

Product Details

UPC / SKU7 43715 00501 3
DSLD Entry Date2011-12-23
Product TypeOther Combinations
FormOther (e.g. tea bag)
BrandBluebonnet
DSLD ID3208
Data Updated2026-04-11
Research

Research Evidence

184
Research Sources
55
Avg Quality
91
Systematic Review
75
Meta Analysis
7
Rct
7
Clinical Trial
2
Cochrane Review
1
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.