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NF Formulas Spectra 303-T

product on market Tablet or Pill Integrative Therapeutics Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 67% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

✨ AI-generated · Qwen 3.6 · methodology

This formula contains iodine, zinc, and copper, which are essential minerals for thyroid function and metabolic regulation. L-tyrosine serves as a precursor for thyroid hormones, though evidence for its efficacy in healthy individuals is limited. Research generally supports the safety and necessity of these micronutrients when taken within recommended daily allowances.

AI-generated summary based on research evidence. Not medical advice.

Label

Product Label

Label for NF Formulas Spectra 303-T
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Tablet(s)
Serving Size
Other Combinations
Product Type
67%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Calcium
40 mg (4% DV)
225 mcg (150% DV)
1.5× RDA — within safe limits 245 studies (A:4, B:133)
10 mg (67% DV)
Within RDA (0.9× RDA) 263 studies (A:6, B:134)
500 mcg (25% DV)
Within RDA (0.6× RDA) 37 studies (A:0, B:11)
100 mg
Market median: 500.0mg (223 products) 24 studies (A:0, B:1)
Thyroid
100 mg

Other Ingredients

Cellulose Dicalcium Phosphate modified Cellulose Gum Stearic Acid Magnesium Stearate Silicon Dioxide Modified Cellulose fractionated Coconut Oil Carnauba Wax
Claims

Label Claims — Verification

Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Recommendations: Take 1 tablet one to three times daily.

Warnings & Precautions

If pregnant, nursing, or taking prescription drugs, consult your healthcare practitioner prior to use.

Formulation Notes

Contains no sugar, salt, yeast, wheat, gluten, corn, soy, dairy products, artificial coloring, artificial flavoring, or preservatives.

Additional Information

Integrative Therapeutics' combines the highest quality thyroid tissue with L-tyrosine and nutrients to help support normal thyroid function.

This product contains natural ingredients; color variations are normal.

LI156005.C02 (B160119C)

EVIDENCE-BASED

Supports healthy thyroid function

Metadata

Product Details

UPC / SKU8 71791 00200 5
DSLD Entry Date2013-07-25
Product TypeOther Combinations
FormTablet or Pill
BrandIntegrative Therapeutics
DSLD ID24349
Data Updated2026-04-11
Research

Research Evidence

849
Research Sources
56
Avg Quality
450
Meta Analysis
152
Rct
137
Systematic Review
73
Clinical Trial
11
Regulatory Source
7
Other
7
Guideline
3
Openfda Safety
2
Cochrane Review
2
Observational
A Phosphate binders for preventing and treating chronic kidney disease-mineral and bone disorder (CKD-MBD)
Meta Analysis The Cochrane database of systematic reviews 2018 PubMed DOI
A Calcium supplementation (other than for preventing or treating hypertension) for improving pregnancy and infant outcomes
Meta Analysis The Cochrane database of systematic reviews 2024 PubMed DOI
A Calcium supplementation (other than for preventing or treating hypertension) for improving pregnancy and infant outcomes
Meta Analysis The Cochrane database of systematic reviews 2015 PubMed DOI
A Vitamin and mineral supplementation for maintaining cognitive function in cognitively healthy people in mid and late life
Meta Analysis The Cochrane database of systematic reviews 2018 PubMed DOI
A Calcium supplementation during pregnancy for preventing hypertensive disorders and related problems
Meta Analysis The Cochrane database of systematic reviews 2025 PubMed DOI
A Dietary calcium supplementation for preventing colorectal cancer and adenomatous polyps
Systematic Review The Cochrane database of systematic reviews 2008 PubMed DOI
A Calcium and vitamin D for increasing bone mineral density in premenopausal women
Systematic Review The Cochrane database of systematic reviews 2023 PubMed DOI
A Dietary sodium, sodium-to-potassium ratio, and risk of stroke: A systematic review and nonlinear dose-response meta-analysis
Meta Analysis Clinical nutrition (Edinburgh, Scotland) 2019 PubMed DOI
A The association between circulating magnesium and clinically relevant outcomes in patients with chronic kidney disease: A systematic review and meta-analysis
Meta Analysis Clinical nutrition (Edinburgh, Scotland) 2021 PubMed DOI
A Calcium channel blockers versus other classes of drugs for hypertension
Systematic Review The Cochrane database of systematic reviews 2021 PubMed DOI
View all evidence for Electrolytes →
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.