Joint Again

product on market Tablet or Pill Guardian Health 🟢 Safety: 100/100
Brand: Guardian Health
🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 75% of ingredients have research evidence
A Label Compliance Grade

Product Label

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Label Data

1 Tablet(s) Serving Size
120 Servings
Other Combinations Product Type
75% Evidence Coverage

Supplement Facts — Evidence Check

Vitamin C
100 mg (111% DV)
1000 mg
📊 Market median: 1000.0mg (1115 products) 📚 22 studies (Tier A: 0, B: 9)
This product: 1000mg
50 mg
📊 Market median: 375.0mg (171 products) 📚 30 studies (Tier A: 1, B: 14)
This product: 50mg
15 mg
📊 Market median: 450.0mg (254 products) 📚 240 studies (Tier A: 0, B: 100)
This product: 15mg

Other Ingredients

Hydroxypropyl Cellulose Microcrystalline Cellulose Stearic Acid Hydroxypropyl Methylcellulose Silicon Dioxide Croscarmellose Sodium Magnesium Stearate Micro Wax Food Glaze Maltodextrin Water

Label Claims — Verification

❓ All Other
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

Suggested Use: As a dietary supplement, take one tablet after meal, once a day.

⚠️ Warnings & Precautions

Keep out of reach of children.

Warning: If you are pregnant, lactating, or have serious medical condition, you should not use this product before consulting a physician.

Caution: Contains shellfish

Additional Information

Store in a cool dry place below 30 degrees C (86 degrees F) and avoid exposure to sunlight.

Made In USA With Globally Sourced Ingredients

Product Details

UPC / SKU 8 18174 02023 2
DSLD Entry Date 2023-11-22
Product Type Other Combinations
Form Tablet or Pill
Brand Guardian Health
DSLD ID 299119
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
PubMed DOI Cochrane
A Vitamin C supplementation for the primary prevention of cardiovascular disease
Systematic Review The Cochrane database of systematic reviews 2017
PubMed DOI Cochrane
A Vitamin C for preventing and treating the common cold
Meta Analysis The Cochrane database of systematic reviews 2013
PubMed DOI Cochrane
A Vitamin C for preventing and treating pneumonia
Meta Analysis The Cochrane database of systematic reviews 2013
PubMed DOI Cochrane
A Vitamin E supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015
PubMed DOI
A Vitamin C supplementation for prevention and treatment of pneumonia
Meta Analysis The Cochrane database of systematic reviews 2020
PubMed DOI Cochrane
A Vitamin C supplementation for prevention and treatment of pneumonia
Systematic Review The Cochrane database of systematic reviews 2021
PubMed DOI Cochrane
A Nutritional interventions for preventing and treating pressure ulcers
Meta Analysis The Cochrane database of systematic reviews 2024
PubMed DOI
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
PubMed DOI
A Circulating vitamin C concentration and risk of cancers: a Mendelian randomization study
Meta Analysis BMC medicine 2021
PubMed DOI
View all evidence for Vitamin C →

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