NutriBiotic DefensePlus®, Maximum Strength, 45 Vegan Tablets supplement bottle
NutriBiotic

DefensePlus®, Maximum Strength, 45 Vegan Tablets

What We Researched
11 active ingredients analyzed · 7 inactive ingredients decoded · 2 brand certifications checked · 2 retailers compared · Last updated: Mar 2026
68
Product Score Fair
65
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin C (as Meta-C® calcium ascorbate) 125 mg 207%
Zinc (gluconate) 5 mg 33%
Grapefruit Seed Extract 250 mg *
Astragalus Root 100 mg *
Reishi Mushroom Extract (4:1) 100 mg *
Echinacea Angustifolia Extract (4:1) 50 mg *
Ginger Root Extract (6:1) 50 mg *
Maitake Mushroom Extract (4:1) 50 mg *
Oregon Grape Root 50 mg *
Shiitake Mushroom Extract (4:1) 50 mg *
Yarrow Extract (6:1) 50 mg *
Bioavailability Good

Absorption Rating

  • Vitamin C (as Meta-C® calcium ascorbate) Good
  • Zinc (gluconate) Fair
  • Grapefruit Seed Extract Fair
  • Astragalus Root Poor
  • Reishi Mushroom Extract (4:1) Good
  • Echinacea Angustifolia Extract (4:1) Good
  • Ginger Root Extract (6:1) Good
  • Maitake Mushroom Extract (4:1) Good
  • Oregon Grape Root Poor
  • Shiitake Mushroom Extract (4:1) Fair
  • Yarrow Extract (6:1) Fair
Other Ingredients Excellent

Fillers & Additives

  • Microcrystalline cellulose (binder)
  • Dicalcium Phosphate
  • Stearic Acid
  • Dextrose
  • Silica dioxide
  • Magnesium Stearate (Vegetable Lubricant)
  • Natural food glaze coating
Efficacy Very Poor

Dosage Analysis

  • Vitamin C (as Meta-C® calcium ascorbate) 125 mg Effective
  • Zinc (gluconate) 5 mg Under-dosed
  • Astragalus Root 100 mg Under-dosed
  • Reishi Mushroom Extract (4:1) 100 mg Under-dosed
  • Echinacea Angustifolia Extract (4:1) 50 mg Under-dosed
  • Ginger Root Extract (6:1) 50 mg Under-dosed
  • Maitake Mushroom Extract (4:1) 50 mg Under-dosed
  • Oregon Grape Root 50 mg Under-dosed
  • Yarrow Extract (6:1) 50 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin C (as Meta-C® calcium ascorbate) 125 mg 207%
Zinc (gluconate) 5 mg 33%
Grapefruit Seed Extract 250 mg *
Astragalus Root 100 mg *
Reishi Mushroom Extract (4:1) 100 mg *
Echinacea Angustifolia Extract (4:1) 50 mg *
Ginger Root Extract (6:1) 50 mg *
Maitake Mushroom Extract (4:1) 50 mg *
Oregon Grape Root 50 mg *
Shiitake Mushroom Extract (4:1) 50 mg *
Yarrow Extract (6:1) 50 mg *

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Microcrystalline cellulose (binder) Unknown
Dicalcium Phosphate Safe

Serves as both a filler and a supplemental source of calcium and phosphorus.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Dextrose Generally_safe

It is used as a filler, sweetener, or to improve the flow of powders.

Silica dioxide Unknown
Magnesium Stearate (Vegetable Lubricant) Generally_safe

It is used as a lubricant to prevent ingredients from sticking to manufacturing equipment.

Natural food glaze coating Unknown

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$15$14$13$12$11 Mar 12 $13.12
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
NutriBiotic

Founded 1981 · Lakeport, California, United States · 81 products · nutribiotic.com/

Certifications

2 certifications
Fda Gmp Inspections Verified Source
Usda Organic Verified Source

Transparency

2 claims
Third Party Testing Claim — Claimed Source

Violation History

1 incident
Prop 65 Not specified in the provided document2012-05-09Source
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Frequently Asked Questions
Is NutriBiotic DefensePlus®, Maximum Strength a good supplement?

NutriBiotic DefensePlus®, Maximum Strength, 45 Vegan Tablets received a product quality score of 68/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 11 active ingredients with 45 servings per container. Of the 7 inactive ingredients, 2 are rated safe and 0 are flagged for review. The manufacturer, NutriBiotic, holds a brand trust score of 65/100 with 2 verified certifications including Fda Gmp Inspections, Usda Organic.

What are the ingredients in NutriBiotic DefensePlus®, Maximum Strength?

NutriBiotic DefensePlus®, Maximum Strength contains 11 active ingredients: Vitamin C (as Meta-C® calcium ascorbate) (125 mg), Zinc (gluconate) (5 mg), Grapefruit Seed Extract (250 mg), Astragalus Root (100 mg), Reishi Mushroom Extract (4:1) (100 mg), Echinacea Angustifolia Extract (4:1) (50 mg), and 5 more. Notable high-dose ingredients include Vitamin C at 207% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is NutriBiotic DefensePlus®, Maximum Strength safe to take?

NutriBiotic DefensePlus®, Maximum Strength, 45 Vegan 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.

Is NutriBiotic a trustworthy supplement brand?

NutriBiotic receives a brand trust score of 65/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1981 and headquartered in Lakeport, California, United States, the company offers 81 products in their lineup. They hold 2 verified certifications including Fda Gmp Inspections, Usda Organic. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: NutriBiotic has 1 historical regulatory incident on record, which are factored into the trust score.

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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.