🟢 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

3 Tablet(s) Serving Size
20 Servings
Other Combinations Product Type
50% Evidence Coverage

Supplement Facts — Evidence Check

Vitamin C
500 mg (556% DV)
20 mg (1176% DV)
📊 15.4× RDA — above typical dose (UL: 100 mg) 📚 113 studies (Tier A: 3, B: 35)
RDA 1.3mg This product: 20mg UL 100mg
100 mg (2000% DV)
📊 20.0× RDA — above typical dose 📚 1 studies — no high-quality reviews
RDA 5mg This product: 100mg
Calcium
85 mg (7% DV)
40 mg (10% DV)
📊 Market median: 4002.0mg (1 products) 📚 20 studies (Tier A: 0, B: 2)
This product: 40mg
10 mg (91% DV)
✅ Within RDA (0.9× RDA of 11 mg) 📚 258 studies (Tier A: 6, B: 134)
RDA 11mg This product: 10mg UL 40mg
800 mg
📊 Market median: 500.0mg (283 products) 📚 173 studies (Tier A: 0, B: 62)
This product: 800mg
Nettle Leaf Extract
500 mg
435 mg
📊 Market median: 200.0mg (136 products) 📚 3 studies — no high-quality reviews
This product: 435mg
📊 Market median: 420.0mg (127 products) 📚 1 studies (Tier A: 0, B: 1)
This product: 200mg

Other Ingredients

Stearic Acid Croscarmellose Sodium Microcrystalline Cellulose Hypromellose Vegetarian Coating Silicon Dioxide Magnesium Stearate

Label Claims — Verification

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

Target Groups

Vegan Vegetarian Adult (18 - 50 Years) Gluten Free Dairy Free

Product Information

📋 Directions for Use

Suggested usage: Take 3 tablets daily, preferably on an empty stomach. Persons with sensitive stomachs may take with food.

⚠️ Warnings & Precautions

Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.

Caution: For adults only.

Quercetin may interact with a variety of medications; consult physician before using this product if taking prescription drugs. Consult physician if pregnant/nursing, or have a medical condition (especially kidney dysfunction).

Keep out of reach of children.

🧪 Formulation Notes

This product is a combination of key vitamins, minerals and herbal extracts that nutritionally supports healthy respiratory functions.

Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients.

Natural color variation may occur in this product.

Respiratory support

Respir-Guard With quercetin, vitamin C, nettle extract & bromelain

V Vegan

Additional Information

1 year happiness guarantee

Guaranteed Quality & Potency

Product Details

UPC / SKU 8 10026 42141 9
DSLD Entry Date 2023-03-22
Product Type Other Combinations
Form Tablet or Pill
Brand LuckyVitamin
DSLD ID 283290
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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