🟢 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

2 Caplet(s) Serving Size
60 Servings
Other Combinations Product Type
50% Evidence Coverage

Supplement Facts — Evidence Check

Sodium
60 mg (3% DV)
📊 Market median: 1000.0mg (1115 products) 📚 22 studies (Tier A: 0, B: 9)
This product: 750mg
📊 Market median: 600.0mg (79 products) 📚 24 studies (Tier A: 0, B: 6)
This product: 600mg
TamaFlex
125 mg
📊 Market median: 20.0mg (931 products) 📚 233 studies (Tier A: 1, B: 90)
This product: 20mg
📊 Market median: 100.0mg (173 products)
Median 100.0mg This product: 2.5mg

Other Ingredients

Microcrystalline Cellulose Croscarmellose Sodium Hydroxypropyl Methylcellulose Stearic Acid Titanium Dioxide Magnesium Stearate Polyethylene Glycol Silicon Dioxide Talc Hydroxypropylcellulose Riboflavin

Label Claims — Verification

All Other
Structure/Function
All Other (100% of products) Structure/Function (89% of products) Nutrient (16% of products)

Target Groups

Adult (18 - 50 Years) Gluten Free Dairy Free Sugar Free

Product Information

📋 Directions for Use

Directions: As a dietary supplement, take two caplets in the morning and two in the evening.

⚠️ Warnings & Precautions

Contains: Crustaceans (Shrimp).

Warning: Consult your physician prior to using this product if you are pregnant, nursing, taking medication, or have a medical condition.

Discontinue use two weeks prior to surgery.

Keep out of reach of children.

🧪 Formulation Notes

In addition to TamaFlex, you get: Glucosamine and chondroitin

Building blocks essential for healthy cartilage Support the body's ability to maintain joint health associated with aging and daily wear and tear

UC-II Collagen A patented undenatured Type II collagen clinically studied for joint health

Hyaluronic acid An important structural component to support joint cushioning

Clinically proven joint support: Helps you feel better in just two weeks Provides 6x more comfort and 7.5x better function Reduces discomfort following exercise and daily activities Improves stiffness and flexibility Improves ability to climb stairs Increases knee joint range of motion

In a randomized, double blinded trial, 90 healthy adults took 125 mg of TamaFlex or placebo twice daily for 90 days. Those taking TamaFlex had improved (i) joint comfort, stiffness and function (WOMAC), (ii) walking speed and distance, (iii) use of stairs. Improvements were seen as early as 2 weeks for comfort and stiffness.

Proven joint support

Clinical strength dose of glucosamine & chondroitin plus UC-II collagen

7.5x better function 6x more comfort

No sugar, no starch, no artificial flavors, no preservatives, no wheat, gluten free, no corn, no soy, no dairy.

Additional Information

Feel the benefits of additional support.

Our quality commitment to you Since 1935, our mission as the industry leader has been to provide you with the highest-quality nutritional supplements. We continue to stand behind the mission. If you're not 100% satisfied with your purchase, return the unused portion of the product with your receipt within 30 days and we'll either refund your money or find a replacement product that is right for you.

Please recycle this box.

Feel the difference. Whether you're running errands or running laps, you don't have to let occasional joint discomfort and stiffness slow you down.

Store in a cool, dry place.

Product Details

DSLD Entry Date 2020-05-22
Product Type Other Combinations
Form Other (e.g. tea bag)
Brand GNC
DSLD ID 219249
Data Updated 2026-04-11

Research Evidence

39 Research Sources
50 Avg Quality Score
20 Rct
9 Meta Analysis
4 Clinical Trial
3 Systematic Review
1 Regulatory Source
1 Openfda Safety
B Interventions for the management of temporomandibular joint osteoarthritis
Systematic Review The Cochrane database of systematic reviews 2012
B Glucosamine therapy for treating osteoarthritis
Meta Analysis The Cochrane database of systematic reviews 2005
B Chondroitin for osteoarthritis
Meta Analysis The Cochrane database of systematic reviews 2015
B Efficacy and safety of the combination of glucosamine and chondroitin for knee osteoarthritis: a systematic review and meta-analysis
Meta Analysis Archives of orthopaedic and trauma surgery 2023
B Glucosamine, chondroitin sulfate, and the two in combination for painful knee osteoarthritis
Rct The New England journal of medicine 2006
B Oral Glucosamine in the Treatment of Temporomandibular Joint Osteoarthritis: A Systematic Review
Systematic Review International journal of molecular sciences 2023
B Scientific Opinion on glucosamine and joint health
Regulatory Source EFSA Journal 2009
B Clinical Efficacy and Safety of Chondroitin Combined with Glucosamine in the Treatment of Knee Osteoarthritis: A Systematic Review and Meta-Analysis
Meta Analysis Computational and mathematical methods in medicine 2022
B Combined chondroitin sulfate and glucosamine for painful knee osteoarthritis: a multicentre, randomised, double-blind, non-inferiority trial versus celecoxib
Rct Annals of the rheumatic diseases 2016
B Effectiveness and safety of glucosamine and chondroitin for the treatment of osteoarthritis: a meta-analysis of randomized controlled trials
Meta Analysis Journal of orthopaedic surgery and research 2018
View all evidence for Glucosamine →

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