Integrative Therapeutics Spectra 303-T supplement bottle
Integrative Therapeutics

Spectra 303-T Review

What We Researched
5 active ingredients analyzed · 9 inactive ingredients decoded · 6 brand certifications checked · Last updated: Aug 2026
92
Product Score Excellent
100
Brand Score Excellent

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Iodine (as Potassium Iodide) 225 mcg 150%
Zinc (as Zinc Gluconate) 10 mg 67%
Copper (as Copper Gluconate) 500 mcg 25%
L-Tyrosine 100 mg
Thyroid 100 mg
Bioavailability Excellent

Absorption Rating

  • Iodine (as Potassium Iodide) Good
  • Zinc (as Zinc Gluconate) Good
  • Copper (as Copper Gluconate) Good
  • L-Tyrosine Good
  • Thyroid Fair
Other Ingredients Excellent

Fillers & Additives

  • Cellulose
  • Dicalcium Phosphate
  • Modified Cellulose Gum
  • Stearic Acid
  • Magnesium Stearate
  • Silicon Dioxide
  • Modified Cellulose
  • Glycerin
  • Carnauba Wax
Efficacy Very Good

Dosage Analysis

  • Iodine (as Potassium Iodide) 225 mcg Effective
  • Zinc (as Zinc Gluconate) 10 mg Effective
  • Copper (as Copper Gluconate) 500 mcg Effective
  • L-Tyrosine 100 mg Under-dosed
  • Thyroid 100 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Iodine (as Potassium Iodide) 225 mcg 150%
Zinc (as Zinc Gluconate) 10 mg 67%
Copper (as Copper Gluconate) 500 mcg 25%
L-Tyrosine 100 mg
Thyroid 100 mg

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Cellulose Safe

Provides bulk and structure in tablets and capsules.

Dicalcium Phosphate Safe

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

Modified Cellulose Gum Generally_safe

It is used to improve the texture and stability of products.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Modified Cellulose Safe

Creates vegetarian capsule shells with controlled dissolution.

Glycerin Safe

Retains moisture and helps dissolve ingredients in softgels and liquids.

Carnauba Wax Safe

Provides a glossy, protective coating on tablets.

Brand Trust Report
Integrative Therapeutics

Founded 2000 · Green Bay, WI, United States · 12 products · integrativepro.com

Certifications

6 certifications
Consumerlab Verified Source
Fda Gmp Inspections Verified Source
Nsf Gmp Verified Source
NSF Certified Verified
Non-GMO Project Verified Verified
Gluten-Free Certified Verified

Transparency

3 claims
Third Party Testing Claim — Verified Source
Testing Lab Disclosure — Verified Source
In House Testing — Verified Source
Related Supplements
Frequently Asked Questions
Is Integrative Therapeutics Spectra 303-T a good supplement?

Integrative Therapeutics Spectra 303-T received a product quality score of 92/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 5 active ingredients Of the 9 inactive ingredients, 8 are rated safe and 0 are flagged for review. The manufacturer, Integrative Therapeutics, holds a brand trust score of 100/100 with 6 verified certifications including Consumerlab, Fda Gmp Inspections, Nsf Gmp, NSF Certified.

What are the ingredients in Integrative Therapeutics Spectra 303-T?

Integrative Therapeutics Spectra 303-T contains 5 active ingredients: Iodine (as Potassium Iodide) (225 mcg), Zinc (as Zinc Gluconate) (10 mg), Copper (as Copper Gluconate) (500 mcg), L-Tyrosine (100 mg), Thyroid (100 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Integrative Therapeutics Spectra 303-T safe to take?

Integrative Therapeutics Spectra 303-T 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 Integrative Therapeutics a trustworthy supplement brand?

Integrative Therapeutics receives a brand trust score of 100/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 2000 and headquartered in Green Bay, WI, United States, the company offers 12 products in their lineup. They hold 6 verified certifications including Consumerlab, Fda Gmp Inspections, Nsf Gmp, NSF Certified. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. No regulatory violations or FDA warning letters were found in our research.

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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 — read our methodology. 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.