🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 73% of ingredients have research evidence
A Label Compliance Grade

Product Label

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Label Data

3 Caplet(s) Serving Size
33 Servings
Other Combinations Product Type
73% Evidence Coverage

Supplement Facts — Evidence Check

Vitamin C
300 mg (330% DV)
1 mg (80% DV)
✅ Within RDA (0.8× RDA of 1.2 mg) 📚 76 studies (Tier A: 0, B: 33)
RDA 1.2mg This product: 1mg
3 mg (230% DV)
✅ 2.3× RDA — within safe limits 📚 12 studies (Tier A: 0, B: 1)
RDA 1.3mg This product: 3mg
10 mg (60% DV)
✅ Within RDA (0.7× RDA of 14 mg) 📚 193 studies (Tier A: 5, B: 63)
RDA 14mg This product: 10mg UL 35mg
1 mg (60% DV)
✅ Within RDA (0.8× RDA of 1.3 mg) 📚 113 studies (Tier A: 3, B: 35)
RDA 1.3mg This product: 1mg UL 100mg
5 mcg (210% DV)
✅ 2.1× RDA — within safe limits 📚 138 studies (Tier A: 1, B: 44)
RDA 0.0024mg This product: 0.005mg
5 mg (100% DV)
✅ Within RDA (1.0× RDA of 5 mg) 📚 1 studies — no high-quality reviews
RDA 5mg This product: 5mg
Calcium
87 mg (6% DV)
334 mg (60% DV)
✅ Within RDA (0.6× RDA of 550 mg) 📚 36 studies (Tier A: 1, B: 7)
RDA 550mg This product: 334mg UL 3500mg
600 mg
📊 Market median: 500.0mg (283 products) 📚 173 studies (Tier A: 0, B: 62)
This product: 600mg
334 mg
📊 Market median: 550.0mg (217 products) 📚 29 studies (Tier A: 0, B: 5)
This product: 334mg

Other Ingredients

Croscarmellose Sodium Stearic Acid Magnesium Stearate Silicon Dioxide Cellulose Ethyl Vanillin Hypromellose Polyvinyl Alcohol Titanium Dioxide Lecithin FD&C Red #40 Lake FD&C Yellow #6 Xanthan Gum FD&C Blue #1 Triacetin Carnauba Wax Talc

Label Claims — Verification

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

Target Groups

Adult (18 - 50 Years)

Product Information

📋 Directions for Use

Directions: Adults - Take three caplets daily, preferably with food, as a dietary supplement.

⚠️ Warnings & Precautions

Warning: If you are pregnant, nursing, taking any medications or planning any medical procedure, 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

May support circulation in the inner ear

Guaranteed no added: Sugar, starch, soy, yeast, dairy, egg, wheat, fish, tree nuts, peanuts, crustacean shellfish, fragrance or artificial flavors.

Soy free

Additional Information

Mason Guarantee Laboratory Tested cGMP Certified Good Manufacturing Practice Certified

Mason Natural Est. 1967

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

Product Details

UPC / SKU 3 11845 15131 5
DSLD Entry Date 2020-02-26
Product Type Other Combinations
Form Other (e.g. tea bag)
DSLD ID 214574
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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