🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 50% of ingredients have research evidence
A Label Compliance Grade

Product Label

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Label Data

1 Capsule(s) Serving Size
60 Servings
Other Combinations Product Type
50% Evidence Coverage

Supplement Facts — Evidence Check

Vitamin C
700 mg (1167% DV)
250 mg
📊 Market median: 500.0mg (283 products) 📚 173 studies (Tier A: 0, B: 62)
This product: 250mg

Other Ingredients

Gelatin Magnesium Stearate Cellulose

Label Claims — Verification

Nutrient
All Other
Structure/Function
All Other (99% of products) Structure/Function (83% of products) Nutrient (54% of products)

Target Groups

Adult (18 - 50 Years) Gluten Free

Product Information

📋 Directions for Use

Directions: As a dietary supplement, take 1 capsule in the morning and 1 capsule in the evening, preferably with meals.

⚠️ Warnings & Precautions

Tamper evident: Do not use this product if imprinted foil seal under cap is broken or missing.

Keep out of reach of children.

Caution: If you are pregnant or nursing, consult your physician before taking this product.

🧪 Formulation Notes

Quercetin Plus Vitamin C is a high-potency, synergistic combination of Quercetin, a non-citrus bio-active bioflavonoid derived from Rutin from Pagoda Tree buds and corn free pure crystalline vitamin C. Quercetin is more potent than common bioflavonoid complexes and contains no citrus allergens.

Quercetin Plus Vitamin C is a high-potency, synergistic combination of Quercetin, a non-citrus bio-active bioflavonoid derived from Rutin from Pagoda Tree buds and corn free pure crystalline vitamin C. Quercetin is more potent than common bioflavonoid complexes and contains no citrus allergens.

It is a natural antioxidant and an active derivative of the bioflavonoid Rutin.

Mfg. in a Ko Kosher Certified, FDA Registered Facility, using Good Manufacturing Practices (GMPs)

Mfg. in a Ko Kosher Certified, FDA Registered Facility, using Good Manufacturing Practices (GMPs)

Supports antioxidant health and immune system health

Gluten free

Made in USA

Additional Information

Conforms to USP <2091> for weight. Meets USP <2040> disintegration for maximum bioavailability.

Keep tightly closed. Store at room temperature: 59 degrees - 86 degrees F (15 degrees - 30 degrees C).

Product Details

DSLD Entry Date 2023-09-25
Product Type Other Combinations
Form Capsule
Brand Foster Regal
DSLD ID 297011
Data Updated 2026-04-11

Research Evidence

371 Research Sources
54 Avg Quality Score
148 Meta Analysis
82 Systematic Review
71 Rct
62 Clinical Trial
2 Regulatory Source
1 Cochrane Review
1 Narrative Review
1 Other
1 Openfda Safety
A Vitamin C supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015
A Vitamin C supplementation for the primary prevention of cardiovascular disease
Systematic Review The Cochrane database of systematic reviews 2017
A Vitamin C for preventing and treating the common cold
Meta Analysis The Cochrane database of systematic reviews 2013
A Vitamin C for preventing and treating pneumonia
Meta Analysis The Cochrane database of systematic reviews 2013
A Vitamin E supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015
A Vitamin C supplementation for prevention and treatment of pneumonia
Meta Analysis The Cochrane database of systematic reviews 2020
A Vitamin C supplementation for prevention and treatment of pneumonia
Systematic Review The Cochrane database of systematic reviews 2021
A Nutritional interventions for preventing and treating pressure ulcers
Meta Analysis The Cochrane database of systematic reviews 2024
A Does Vitamin C Supplementation Provide a Protective Effect in Periodontal Health? A Systematic Review and Meta-Analysis
Meta Analysis International journal of molecular sciences 2024
A Circulating vitamin C concentration and risk of cancers: a Mendelian randomization study
Meta Analysis BMC medicine 2021
View all evidence for Vitamin C →

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