Nature Made TripleFlex With Vitamin D3 supplement bottle
Nature Made

TripleFlex With Vitamin D3

What We Researched
5 active ingredients analyzed · 13 inactive ingredients decoded · 4 brand certifications checked · 1 retailer compared · Last updated: Mar 2026
81
Product Score Good
86
Brand Score Good

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin D3 2000 IU 500%
Glucosamine Hydrochloride 1.5 g
Chondroitin Sulfate 800 mg
Methylsulfonylmethane 750 mg
Bioavailability Very Good

Absorption Rating

  • Vitamin D3 Good
  • Glucosamine Hydrochloride Fair
  • Chondroitin Sulfate Good
  • Methylsulfonylmethane Good
Other Ingredients Good

Fillers & Additives

  • Glucosamine Hydrochloride
  • Sodium Chondroitin Sulfate
  • Methylsulfonylmethane
  • Hypromellose
  • Color Added Medium
  • Silicon Dioxide
  • Magnesium Stearate
  • Glyceryl Behenate
  • Polyethylene Glycol Low
  • Corn Starch
  • Triethyl Citrate
  • Polysorbate 80 Medium
  • Vitamin D3
Efficacy Very Good

Dosage Analysis

  • Vitamin D3 2000 IU Effective
  • Glucosamine Hydrochloride 1.5 g Effective
  • Chondroitin Sulfate 800 mg Effective
  • Methylsulfonylmethane 750 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin D3 2000 IU 500%
Sodium 75 mg 3%
Glucosamine Hydrochloride 1.5 g
Chondroitin Sulfate 800 mg
Methylsulfonylmethane 750 mg

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Glucosamine Hydrochloride Unknown
Sodium Chondroitin Sulfate Unknown
Methylsulfonylmethane Unknown
Hypromellose Safe

Forms vegetarian capsule shells. Dissolves easily in the stomach.

Color Added Caution

It is used to improve the appearance of the supplement.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Glyceryl Behenate Safe

It is used as a lubricant in tablet and capsule manufacturing.

Polyethylene Glycol Caution

It is used as a binder, coating agent, or to improve solubility.

Corn Starch Generally_safe

It is used as a filler, binder, or thickener.

Triethyl Citrate Generally_safe

It is used as a plasticizer or solvent.

Polysorbate 80 Caution

Helps mix oil and water-based ingredients.

Vitamin D3 Safe

It is added to supplements to provide vitamin D, which is essential for bone health and immune function.

Price Comparison

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

Brand Trust Report
Nature Made

Founded 1971 · West Hills, California, USA · 161 products · naturemade.com

Certifications

4 certifications
Consumerlab Verified Source
Labdoor Verified Source
Usp Verified Verified Source
Fda Gmp Inspections Verified Source

Transparency

4 claims
Third Party Testing Claim — Verified Source
Coa Availability — Claimed Source
In House Testing — Verified Source

Violation History

2 incidents
Lawsuit Presence of toxic plastic chemicals in prenatal multivitamins.2025Source
Recall Specific lots of Nature Made Adult Gummies Multi, Multi + Omega-3, Multi for Her plus Omega-3s, and Super B Complex w/C & Folic Acid2016-06-15Source
Related Supplements
Frequently Asked Questions
Is Nature Made TripleFlex With Vitamin D3 a good supplement?

Nature Made TripleFlex With Vitamin D3 received a product quality score of 81/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 5 active ingredients with 40 servings per container. Of the 13 inactive ingredients, 5 are rated safe and 3 are flagged for review. The manufacturer, Nature Made, holds a brand trust score of 86/100 with 4 verified certifications including Consumerlab, Labdoor, Usp Verified, Fda Gmp Inspections.

What are the ingredients in Nature Made TripleFlex With Vitamin D3?

Nature Made TripleFlex With Vitamin D3 contains 5 active ingredients: Vitamin D3 (2000 IU), Sodium (75 mg), Glucosamine Hydrochloride (1.5 g), Chondroitin Sulfate (800 mg), Methylsulfonylmethane (750 mg). Notable high-dose ingredients include Vitamin D3 at 500% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Nature Made TripleFlex With Vitamin D3 safe to take?

Nature Made TripleFlex With Vitamin D3 has been analyzed for ingredient safety across all its components. Of 13 inactive ingredients, 5 are rated safe. 3 ingredients are flagged for review: Color Added, Polyethylene Glycol, Polysorbate 80. 'Caution' doesn't mean dangerous — it indicates the ingredient has some considerations worth being aware of, such as potential sensitivities or ongoing research. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Nature Made a trustworthy supplement brand?

Nature Made receives a brand trust score of 86/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1971 and headquartered in West Hills, California, USA, the company offers 161 products in their lineup. They hold 4 verified certifications including Consumerlab, Labdoor, Usp Verified, Fda Gmp Inspections. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Nature Made has 2 historical regulatory incidents on record, which are factored into the trust score.

How much vitamin d3 should i take daily?

The optimal dosage depends on your individual health needs, age, sex, and current nutrient levels. Recommended daily amounts are established by health authorities but may vary from therapeutic doses used in clinical research. It's important to check the Supplement Facts label for the exact amount per serving and compare it against the % Daily Value. Some supplements provide mega-doses well above the Daily Value, which may not be necessary and in some cases could be harmful — particularly for fat-soluble vitamins (A, D, E, K) that accumulate in the body. GoodSupp's efficacy analysis evaluates whether a product's dosages align with clinically studied amounts. Always consult your healthcare provider for personalized dosage recommendations.

What does vitamin d do?

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 much vitamin d3 per day for a woman?

The optimal dosage depends on your individual health needs, age, sex, and current nutrient levels. Recommended daily amounts are established by health authorities but may vary from therapeutic doses used in clinical research. It's important to check the Supplement Facts label for the exact amount per serving and compare it against the % Daily Value. Some supplements provide mega-doses well above the Daily Value, which may not be necessary and in some cases could be harmful — particularly for fat-soluble vitamins (A, D, E, K) that accumulate in the body. GoodSupp's efficacy analysis evaluates whether a product's dosages align with clinically studied amounts. Always consult your healthcare provider for personalized dosage recommendations.

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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.