C Buffered with Bioflavonoids
100/100
This product looks safe
- No ingredients exceed tolerable upper intake levels
- 33% of ingredients have research evidence
A
Label Compliance Grade
Product Label
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Label Data
1 Vegetable Capsule(s)
Serving Size
90
Servings
Other Combinations
Product Type
33%
Evidence Coverage
Supplement Facts — Evidence Check
Vitamin C
500 mg
(833% DV)
Calcium
58 mg
(6% DV)
📊 Market median: 500.0mg (283 products)
📚 173 studies (Tier A: 0, B: 62)
Other Ingredients
Rice Flour
Hydroxypropyl Methylcellulose
L-Leucine
Label Claims — Verification
❓
All Other
All Other (99% of products)
Structure/Function (84% of products)
Nutrient (23% of products)
Qualified Health (1% of products)
Target Groups
Adult (18 - 50 Years)
Product Information
📋 Directions for Use
Directions: One vegetable capsule daily, or more, as directed by a health care professional.
⚠️ Warnings & Precautions
Pregnant and/or lactating women should consult their physician prior to use.
Tamper evident band around cap and seal on bottle. Do not use if either seal is broken or missing.
Keep out of the reach of children.
🧪 Formulation Notes
Progressive Laboratories manufactured this product in its 3rd party GMP-inspected facility. (Good Manufacturing Practices)
Additional Information
Sold only for dispensing by a licensed health professional.
GMP Good Manufacturing Practice Certified GMP Compliant 21 CFR 111
Product Details
UPC / SKU
3 51821 00899 8
DSLD Entry Date
2022-02-23
Product Type
Other Combinations
Form
Capsule
DSLD ID
261469
Data Updated
2026-04-11
Research Evidence
184
Research Sources
55
Avg Quality Score
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
B
Effects of quercetin supplementation on lipid profile: A systematic review and meta-analysis of randomized controlled trials
B
Dietary polyphenols and the risk of metabolic syndrome: a systematic review and meta-analysis
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
B
A Systematic Review: Quercetin-Secondary Metabolite of the Flavonol Class, with Multiple Health Benefits and Low Bioavailability
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