Natural Balance Super Flex® Joint Formula, 90 Tablets supplement bottle
Natural Balance

Super Flex® Joint Formula, 90 Tablets

What We Researched
9 active ingredients analyzed · 3 inactive ingredients decoded · 1 brand certification checked · 1 retailer compared · Last updated: Mar 2026
68
Product Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Total Carbohydrates <1 g <1%*
Vitamin C (as ascorbic acid) 48 mg 53%
Manganese (from manganese amino acid chelate) 7 mg 304%
Glucosamine Blend (Glucosamine Sulfate KCI, Glucosamine HCI) (shellfish) 500 mg *
MSM (methylsulfonylmethane) 350 mg *
Boswellia (Boswellia serrata) (resin extract) 50 mg *
Ginger (Zingiber officinale) (root) 33 mg *
Turmeric (Curcuma longa) (root extract) Standardized to 14 mg [95%] curcumins) 15 mg *
Japanese Knotweed (Polygonum cuspidatum) (root extract) (Standardized to 2.7 mg [50%] trans-resveratrol) 5 mg *
Bioavailability Good

Absorption Rating

  • Total Carbohydrates Fair
  • Vitamin C (as ascorbic acid) Fair
  • Manganese (from manganese amino acid chelate) Good
  • Glucosamine Blend (Glucosamine Sulfate KCI, Glucosamine HCI) (shellfish) Good
  • MSM (methylsulfonylmethane) Good
  • Boswellia (Boswellia serrata) (resin extract) Good
  • Ginger (Zingiber officinale) (root) Fair
  • Turmeric (Curcuma longa) (root extract) Standardized to 14 mg [95%] curcumins) Poor
  • Japanese Knotweed (Polygonum cuspidatum) (root extract) (Standardized to 2.7 mg [50%] trans-resveratrol) Fair
Other Ingredients Excellent

Fillers & Additives

  • Cellulose
  • Silica
  • Magnesium stearate and stearic acid
Efficacy Very Poor

Dosage Analysis

  • Vitamin C (as ascorbic acid) 48 mg Under-dosed
  • Manganese (from manganese amino acid chelate) 7 mg High
  • Glucosamine Blend (Glucosamine Sulfate KCI, Glucosamine HCI) (shellfish) 500 mg Under-dosed
  • MSM (methylsulfonylmethane) 350 mg Under-dosed
  • Boswellia (Boswellia serrata) (resin extract) 50 mg Under-dosed
  • Ginger (Zingiber officinale) (root) 33 mg Under-dosed
  • Turmeric (Curcuma longa) (root extract) Standardized to 14 mg [95%] curcumins) 15 mg Under-dosed
  • Japanese Knotweed (Polygonum cuspidatum) (root extract) (Standardized to 2.7 mg [50%] trans-resveratrol) 5 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Total Carbohydrates <1 g <1%*
Vitamin C (as ascorbic acid) 48 mg 53%
Manganese (from manganese amino acid chelate) 7 mg 304%
Glucosamine Blend (Glucosamine Sulfate KCI, Glucosamine HCI) (shellfish) 500 mg *
MSM (methylsulfonylmethane) 350 mg *
Boswellia (Boswellia serrata) (resin extract) 50 mg *
Ginger (Zingiber officinale) (root) 33 mg *
Turmeric (Curcuma longa) (root extract) Standardized to 14 mg [95%] curcumins) 15 mg *
Japanese Knotweed (Polygonum cuspidatum) (root extract) (Standardized to 2.7 mg [50%] trans-resveratrol) 5 mg *

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Cellulose Safe

Provides bulk and structure in tablets and capsules.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

Magnesium stearate and stearic acid Unknown

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$13$12$11$10$9 Mar 12 $11.00
iHerb

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
Natural Balance

Founded 1983 · Salt Lake City, UT, USA · 42 products · naturalbalance.com

Certifications

1 certification
Nsf Gmp Verified Source
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Frequently Asked Questions
Is Natural Balance Super Flex® Joint Formula, 90 Tablets a good supplement?

Natural Balance Super Flex® Joint Formula, 90 Tablets received a product quality score of 68/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 9 active ingredients with 45 servings per container. Of the 3 inactive ingredients, 2 are rated safe and 0 are flagged for review.

What are the ingredients in Natural Balance Super Flex® Joint Formula, 90 Tablets?

Natural Balance Super Flex® Joint Formula, 90 Tablets contains 9 active ingredients: Total Carbohydrates (<1 g), Vitamin C (as ascorbic acid) (48 mg), Manganese (from manganese amino acid chelate) (7 mg), Glucosamine Blend (Glucosamine Sulfate KCI, Glucosamine HCI) (shellfish) (500 mg), MSM (methylsulfonylmethane) (350 mg), Boswellia (Boswellia serrata) (resin extract) (50 mg), and 3 more. Notable high-dose ingredients include Manganese at 304% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Natural Balance Super Flex® Joint Formula, 90 Tablets safe to take?

Natural Balance Super Flex® Joint Formula, 90 Tablets has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

How to take turmeric?

This is an important question for supplement consumers. The dietary supplement industry is largely self-regulated, which means product quality, ingredient transparency, and safety practices vary significantly between brands and products. The most reliable way to evaluate any supplement is to check for third-party testing certifications, review the full ingredient list and dosages, and research the brand's regulatory track record. GoodSupp's database of over 250,000 analyzed products provides independent quality scores, ingredient safety ratings, and brand trust reports to help you make evidence-based decisions.

How to use turmeric?

This is an important question for supplement consumers. The dietary supplement industry is largely self-regulated, which means product quality, ingredient transparency, and safety practices vary significantly between brands and products. The most reliable way to evaluate any supplement is to check for third-party testing certifications, review the full ingredient list and dosages, and research the brand's regulatory track record. GoodSupp's database of over 250,000 analyzed products provides independent quality scores, ingredient safety ratings, and brand trust reports to help you make evidence-based decisions.

How to take turmeric for inflammation?

This is an important question for supplement consumers. The dietary supplement industry is largely self-regulated, which means product quality, ingredient transparency, and safety practices vary significantly between brands and products. The most reliable way to evaluate any supplement is to check for third-party testing certifications, review the full ingredient list and dosages, and research the brand's regulatory track record. GoodSupp's database of over 250,000 analyzed products provides independent quality scores, ingredient safety ratings, and brand trust reports to help you make evidence-based decisions.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.