Iodine and Tyrosine

Iodine and Tyrosine

Pure Encapsulations4.8 (17 ratings)
Format:Capsule Quantity: 120 Capsule(s) · 120 servings
Goals
$40.00 $0.33 per serving

About this product

A practical 500 mg L-tyrosine serving is paired with 225 mcg iodine for thyroid-related nutrition. Both active amounts are clearly listed and the capsule is straightforward to use.

Iodine does not create a separate cognitive pathway and may be unsuitable for some thyroid conditions. The product also carries a premium cost without added tyrosine purity or sourcing evidence.

It fits adults specifically advised to combine iodine with tyrosine. Plain L-tyrosine is a safer and less expensive fit when iodine is not needed.

Who is it for
  • adults specifically advised to combine iodine with tyrosine
  • Adults who understand the formula’s focused role
  • Users comfortable with the stated limitations
Best for
  • Clinician-guided iodine and tyrosine use
  • Thyroid-related nutrient support
  • Simple two-active capsules

Pros

  • Preferred L-tyrosine form
  • Both amounts are fully disclosed
  • Focused two-ingredient formula

Cons

  • Premium cost per gram of tyrosine
  • No sourcing or purity assurance
  • Iodine narrows suitability

Warnings

  • The iodine amount may be unsuitable with thyroid disease or thyroid-hormone treatment
  • L-tyrosine may interact with levodopa or MAO inhibitors
  • People with hyperthyroidism should avoid unsupervised use

Product analysis

75 out of 100
The core formula provides a clearly defined role with practical strengths. Iodine does not create a separate cognitive pathway and may be unsuitable for some thyroid conditions.

AI assessment of the formula, label and price. How scoring works

Nutrient quality83

L-tyrosine and iodine are supplied in clear, appropriate chemical forms. The amounts fit thyroid-oriented use, though iodine warrants care in thyroid-sensitive users.

Ingredient transparency86

Both active ingredients have exact amounts and no proprietary blend hides the formula. Full intake directions and the non-active ingredient list are not present in the supplied details.

Customer satisfaction59

The aggregate rating is very strong, but the very small review base makes it uncertain. No detailed feedback is supplied to assess recurring complaints or purpose-specific experiences.

Value for money65

The two-active formula is coherent but carries premium serving value. It compares weakly with simpler tyrosine options unless iodine is specifically wanted.

Format
Capsule
Container
120 Capsule(s)
Per serving
$0.33
Customer rating
4.8 · 17 ratings
Report analysis

Goals

Brain Health
Impact
Moderate effect
C+ Ingredient FitF PathwaysC EvidenceA+ Formulation Logic
Study evidence
Tyrosine Supportive 7 studies

Ingredients

IngredientAmount per servingScore
Iodine (Potassium Iodide)
225 mcg
L-Tyrosine
500 mg 76
Gluten Free Adults 18–50
Report overview
Tyrosine · 500 mg OverallScore76
B- Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyD- Value
Iodine and Tyrosine lists 500 mg of L-tyrosine per serving, at the lower edge of the supplied standard dose range. The form and amount are disclosed, but no grade, testing, fermentation, or GMP details are recorded. The cost per gram sits in a higher supplied price band.
How this ingredient is rated

Active Ingredient Quality & Bioavailability70

It uses the standard L form described in the supplied context, with no raw material quality signals recorded.
Tyrosine Chemical Form
The label identifies L-tyrosine, the standard free form described in the supplied context.
Purity and Sourcing Signals
No grade, third-party purity testing, fermentation, or GMP information is recorded.

Dose, Safety & Label Transparency100

The amount reaches the supplied standard range, and the label clearly identifies the form.
Tyrosine Dosage Adequacy
The label lists 500 mg per serving, at the start of the supplied standard range.
Label Transparency and Blends
The label clearly names L-tyrosine and its exact amount.

Value40

The cost per gram sits toward the higher end of the supplied value bands.
Price per Gram of Tyrosine
Its cost per gram falls in a higher supplied band, though not the highest one.
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Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. Combined L-carnosine and L-tyrosine supplementation as an ergogenic strategy for physical and cognitive performance under fatigue in professional football players.
    Bilgin S; Bozyılan E; Buzdağlı Y; Karaç Öcal Y; Gürkan O; Toktaş S; İnan H; Egil İ; Yarayan YE · Frontiers in nutrition · 2026
    Randomized trial24 participantsBrain Health forTyrosine
  2. Effect of tyrosine supplementation on clinical and healthy populations under stress or cognitive demands--A review.
    Jongkees BJ; Hommel B; Kühn S; Colzato LS · Journal of psychiatric research · 2016
    Narrative reviewBrain Health forTyrosine
  3. Influence of nutritional tyrosine on cognition and functional connectivity in healthy old humans.
    Hensel C; Becker M; Düzel S; Demuth I; Norman K; Steinhagen-Thiessen E; Gallinat J; Lindenberger U; Kühn S · NeuroImage · 2019
    Cross-sectional study286 participantsBrain Health forTyrosine
  4. Dietary Tyrosine Intake (FFQ) Is Associated with Locus Coeruleus, Attention and Grey Matter Maintenance: An MRI Structural Study on 398 Healthy Individuals of the Berlin Aging Study-II.
    Plini ERG; Melnychuk MC; Harkin A; Dahl MJ; McAuslan M; Kühn S; Boyle RT; Whelan R; Andrews R; Düzel S; Drewelies J; Wagner GG; Lindenberger U; Norman K; Robertson IH; Dockree PM · The journal of nutrition, health & aging · 2023
    Cross-sectional study398 participantsBrain Health forTyrosine
  5. Baseline-dependent effect of dopamine's precursor L-tyrosine on working memory gating but not updating.
    Jongkees BJ · Cognitive, affective & behavioral neuroscience · 2021
    Randomized trial45 participantsBrain Health forTyrosine