NutriBiotic Immunity, Vitamin C + D3 & Zinc, 250 Capsules supplement bottle
NutriBiotic

Immunity, Vitamin C + D3 & Zinc, 250 Capsules

What We Researched
3 active ingredients analyzed · 3 inactive ingredients decoded · 2 brand certifications checked · 2 retailers compared · Last updated: Mar 2026
89
Product Score Good
65
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin C (as L-ascorbic acid USP-FCC†) 1,500 mg 1,670%
Vitamin D3 (as cholecalciferol) (5,000 IU) 125 mcg 625%
Zinc (as zinc sulfate) 40 mg 360%
Bioavailability Good

Absorption Rating

  • Vitamin C (as L-ascorbic acid USP-FCC†) Fair
  • Vitamin D3 (as cholecalciferol) (5,000 IU) Good
  • Zinc (as zinc sulfate) Fair
Other Ingredients Excellent

Fillers & Additives

  • Vegetable Cellulose
  • Magnesium Stearate (Vegetable Lubricant)
  • Capsules
Efficacy Excellent

Dosage Analysis

  • Vitamin C (as L-ascorbic acid USP-FCC†) 1,500 mg Effective
  • Vitamin D3 (as cholecalciferol) (5,000 IU) 125 mcg High
  • Zinc (as zinc sulfate) 40 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Vitamin C (as L-ascorbic acid USP-FCC†) 1,500 mg 1,670%
Vitamin D3 (as cholecalciferol) (5,000 IU) 125 mcg 625%
Zinc (as zinc sulfate) 40 mg 360%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Vegetable Cellulose Safe

Forms a vegetarian capsule shell alternative to gelatin.

Magnesium Stearate (Vegetable Lubricant) Generally_safe

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

Capsules Unknown

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$23$22$21$20$19 Mar 12 $21.00
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
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 Immunity, Vitamin C + D3 & Zinc a good supplement?

NutriBiotic Immunity, Vitamin C + D3 & Zinc, 250 Capsules received a product quality score of 89/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 3 active ingredients Of the 3 inactive ingredients, 1 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 Immunity, Vitamin C + D3 & Zinc?

NutriBiotic Immunity, Vitamin C + D3 & Zinc contains 3 active ingredients: Vitamin C (as L-ascorbic acid USP-FCC†) (1,500 mg), Vitamin D3 (as cholecalciferol) (5,000 IU) (125 mcg), Zinc (as zinc sulfate) (40 mg). Notable high-dose ingredients include Vitamin C at 1,670% DV, Vitamin D3 at 625% DV, Zinc at 360% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is NutriBiotic Immunity, Vitamin C + D3 & Zinc safe to take?

NutriBiotic Immunity, Vitamin C + D3 & Zinc, 250 Capsules 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.

What is magnesium good for?

Magnesium Good For is a topic many supplement consumers ask about. In the context of dietary supplements, understanding magnesium good for helps you make more informed choices about what you put in your body. The quality and form of ingredients matters significantly — two products listing the same ingredient can differ dramatically in bioavailability and effectiveness. GoodSupp analyzes over 250,000 supplement products to help consumers understand exactly what's in their supplements and whether the formulation meets quality standards.

How much magnesium per day?

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 is zinc good for?

Zinc Good For is a topic many supplement consumers ask about. In the context of dietary supplements, understanding zinc good for helps you make more informed choices about what you put in your body. The quality and form of ingredients matters significantly — two products listing the same ingredient can differ dramatically in bioavailability and effectiveness. GoodSupp analyzes over 250,000 supplement products to help consumers understand exactly what's in their supplements and whether the formulation meets quality standards.

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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.