L-Tyrosine 750 mg - Extra Strength

L-Tyrosine 750 mg - Extra Strength

NOW4.7 (26,365 ratings)
Format:Capsule Quantity: 90 Capsule(s) · 90 servings
Goals

Product analysis

62 out of 100

L-Tyrosine 750 mg - Extra Strength offers an economical single-ingredient option with possible use during acute stress or sleep loss. That limited role does not establish lasting brain benefits for rested adults.

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

Nutrient Quality20

The tyrosine form is not identified. That limits a useful comparison of ingredient quality.

Ingredient Transparency63

The tyrosine amount is stated, making dose comparisons easier. Its form is not identified, leaving that part of the comparison unclear.

Value For Money100

The cost is low for the tyrosine provided. It offers an economical way to buy tyrosine, without establishing greater benefit.

Customer Satisfaction92

Customer ratings are very positive. A large number of ratings gives a substantial picture of satisfaction, without proving brain benefits.

Product Focus64

The single-ingredient formula has a clear focus. Possible benefits during acute stress or sleep loss should not be read as reliable long-term brain support in rested adults.

Format
Capsule
Container
90 Capsule(s)
Per serving
$0.12
Customer rating
4.7 · 26,365 ratings
Report analysis

Goals

Brain Health
Impact
Moderate effect
A Ingredient FitF PathwaysC EvidenceA+ Formulation Logic

Tyrosine is a building block for brain messengers. The 750 mg serving relates to selected findings under acute stress or sleep loss, rather than reliable long-term brain benefits in rested adults.

How this product is rated for Brain Health

Ingredient fit90

The saved findings focus on the included ingredients, with no unrelated active ingredients counted.
Goal fit
All counted active ingredients relate to the goal; links to other goals also inform the saved finding.
Dose adequacy
The saved amount assessment considers 1 ingredients against their individual references.

Pathways17

The main saved connection concerns brain messenger production.
Depth
Brain messenger production is the strongest saved area, remaining below the coverage threshold.
Breadth
No assessed area reaches the saved coverage threshold.

Evidence64

Tyrosine supplies the strongest saved evidence finding, which must be read within the limits of the supplied research.
Evidence strength
Tyrosine leads the evidence finding among ingredients meeting the saved minimum amount reference.
Studied preparation
The saved assessment marks the preparations of 1 counted ingredients as meeting its evidence requirements.

Formulation logic100

The saved checks record no missing required partner or matched ingredient conflict.
Partner coverage
Each counted ingredient can contribute independently under the saved assessment or has its required partner.
Conflicts
No configured ingredient conflict is recorded.
Effective doses
All 1 counted ingredients meet the saved minimum amount threshold.
Study evidence
Tyrosine Supportive 7 studies

Ingredients

IngredientAmount per servingScore
L-Tyrosine
750 mg 100
Gluten Free Adults 18–50 Dairy Free
Report overview
Tyrosine · 750 mg OverallScore100
A+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value
Each serving provides 750 mg of L-tyrosine, an amount well aligned with acute cognitive support. The saved facts record an ingredient-grade claim, and the whole-product price is about $0.17 per gram of tyrosine.
How this ingredient is rated

Active Ingredient Quality & Bioavailability100

L-tyrosine is the standard form used to raise blood tyrosine levels. An ingredient-grade claim is recorded, though the saved facts do not specify the designation.
Tyrosine Chemical Form
L-tyrosine is the standard form used to raise blood tyrosine levels.
Purity and Sourcing Signals
An ingredient-grade claim is recorded, though the saved facts do not specify the designation.

Dose, Safety & Label Transparency100

The label lists 750 mg of L-tyrosine per serving, an amount well aligned with acute cognitive support.
Tyrosine Dosage Adequacy
The 750 mg per serving is an amount well aligned with acute cognitive support.
Label Transparency and Blends
The label individually lists 750 mg of L-tyrosine per serving.

Value100

The whole-product price works out to about $0.17 per gram of L-tyrosine when the full cost is attributed to this ingredient.
Price per Gram of Tyrosine
The whole-product price works out to about $0.17 per gram of L-tyrosine when the full cost is attributed to this ingredient.
Report alternatives

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