NF Formulas Spectra 303-T
100/100
This product looks safe
- No ingredients exceed tolerable upper intake levels
- 67% of ingredients have research evidence
A
Label Compliance Grade
Product Label
Have a supplement label? Find it here.
Upload a photo of any supplement label to search our database of 92,312 products.
Label Data
1 Tablet(s)
Serving Size
Other Combinations
Product Type
67%
Evidence Coverage
Supplement Facts — Evidence Check
Calcium
40 mg
(4% DV)
225 mcg
(150% DV)
✅ 1.5× RDA — within safe limits
📚 243 studies (Tier A: 4, B: 133)
10 mg
(67% DV)
✅ Within RDA (0.9× RDA of 11 mg)
📚 258 studies (Tier A: 6, B: 134)
500 mcg
(25% DV)
✅ Within RDA (0.6× RDA of 0.9 mg)
📚 36 studies (Tier A: 0, B: 11)
100 mg
📊 Market median: 500.0mg (223 products)
📚 22 studies (Tier 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
Label Claims — Verification
❓
All Other
❓
Structure/Function
All Other (99% of products)
Structure/Function (85% of products)
Nutrient (54% of products)
Approved Health (3% of products)
Target Groups
Adult (18 - 50 Years)
Gluten Free
Dairy Free
Sugar Free
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
Product Details
UPC / SKU
8 71791 00200 5
DSLD Entry Date
2013-07-25
Product Type
Other Combinations
Form
Tablet or Pill
Brand
Integrative Therapeutics
DSLD ID
24349
Data Updated
2026-04-11
Research Evidence
849
Research Sources
56
Avg Quality Score
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)
A
Calcium supplementation (other than for preventing or treating hypertension) for improving pregnancy and infant outcomes
A
Calcium supplementation (other than for preventing or treating hypertension) for improving pregnancy and infant outcomes
A
Vitamin and mineral supplementation for maintaining cognitive function in cognitively healthy people in mid and late life
A
Calcium supplementation during pregnancy for preventing hypertensive disorders and related problems
A
Dietary calcium supplementation for preventing colorectal cancer and adenomatous polyps
A
Calcium and vitamin D for increasing bone mineral density in premenopausal women
A
Dietary sodium, sodium-to-potassium ratio, and risk of stroke: A systematic review and nonlinear dose-response meta-analysis
A
The association between circulating magnesium and clinically relevant outcomes in patients with chronic kidney disease: A systematic review and meta-analysis
Compare Similar Products
Magnesium
Vitabase
100
Natural Magnesium 250 mg
Sunmark
100
Magnesium Taurate 400
Douglas Laboratories
100
Magnesium 250 mg USP
Equaline
100
Magnesium-Oxide
Genesis Products
100