🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 46% of ingredients have research evidence
A Label Compliance Grade

Product Label

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Label Data

8 Tablet(s) Serving Size
30 Servings
Other Combinations Product Type
46% Evidence Coverage

Supplement Facts — Evidence Check

Vitamin C
500 mg (833% DV)
1000 IU (250% DV)
✅ 1.7× RDA — within safe limits 📚 604 studies (Tier A: 16, B: 251)
RDA 0.015mg This product: 0.025mg UL 0.1mg
📊 Market median: 1000.0mg (1115 products) 📚 22 studies (Tier A: 0, B: 9)
This product: 1400mg
MSM
1000 mg
📊 Market median: 1000.0mg (2 products)
This product: 1000mg
📊 Market median: 375.0mg (171 products) 📚 30 studies (Tier A: 1, B: 14)
This product: 800mg
📊 Market median: 600.0mg (79 products) 📚 24 studies (Tier A: 0, B: 6)
This product: 800mg
Cissus quadrangularis extract
800 mg
📊 Market median: 450.0mg (254 products) 📚 240 studies (Tier A: 0, B: 100)
This product: 500mg
400 mg
📊 Market median: 200.0mg (136 products) 📚 3 studies — no high-quality reviews
This product: 400mg
Black Cherry extract
100 mg
Black Pepper extract
5 mg

Other Ingredients

Stearic Acid Croscarmellose Sodium Maltodextrin Silicon Dioxide Dicalcium Phosphate Magnesium Stearate Food Glaze micro fine Wax

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) Gluten Free

Product Information

📋 Directions for Use

Directions: Take 8 tablets daily with or without food.

⚠️ Warnings & Precautions

Warning: This product is only intended for use in healthy adults 18 years of age or older.

Pregnant or nursing women should not use this product. Consult your healthcare provider before using this product, especially if you are taking any prescription, over the counter medication, dietary supplement product, or if you have any pre-existing medical condition including but not limited to: high or low blood pressure, cardiac arrhythmia, stroke, heart, liver, kidney or thyroid disease, seizure disorder, psychiatric disease, diabetes, difficulty urinating due to prostate enlargement or if you are taking a MAOI (Monoamine Oxidase Inhibitor) or any other medication.

Discontinue use and consult your health care professional if you experience adverse reaction to this product. Discontinue use 2 weeks prior to surgery. Do not exceed recommended serving. Do not use if safety seal is broken or missing.

Keep out of reach of children.

Allergen statement: Contains shellfish.

🧪 Formulation Notes

Gluten free

Allergen statement: Contains shellfish.

Additional Information

Core Flex is a complete joint, soft tissue, and overall health supplement. Key ingredients in Core Flex may: Maintain good health. Enhance connective tissue formation. Protect against the deterioration of cartilage. Be a factor in maintaining healthy cartilage and joint health.

Comprehensive joint formula

30 day supply Clinical servings

Manufactured in a U.S. cGMP facility. Made in the USA.

Product Details

UPC / SKU 8 50757 00108 5
DSLD Entry Date 2018-11-21
Product Type Other Combinations
Form Tablet or Pill
DSLD ID 183122
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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