L-Tyrosine 500 mg

L-Tyrosine 500 mg

NOW4.7 (46,456 ratings)
Format:Capsule Quantity: 120 Capsule(s) · 120 servings
Goals

Product analysis

62 out of 100

L-Tyrosine 500 mg may support mental performance during demanding conditions such as stress or sleep loss. It offers good value for the amount of tyrosine supplied.

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

Nutrient Quality20

The specific tyrosine form is not identified, so form quality remains uncertain. The stated amount does not by itself show how the preparation compares with alternatives.

Ingredient Transparency63

The tyrosine amount is disclosed, allowing serving comparisons. Its specific form is not identified.

Value For Money100

Tyrosine offers good value for the amount supplied. That cost finding does not establish a benefit in every setting.

Customer Satisfaction91

Customer ratings are generally positive. A large number of ratings gives a broader picture of customer satisfaction.

Product Focus64

The single amino acid fits a targeted role under stress or sleep loss. Evidence for broader mental benefits in rested adults is limited.

Format
Capsule
Container
120 Capsule(s)
Per serving
$0.08
Customer rating
4.7 · 46,456 ratings
Report analysis

Goals

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

Ingredients

IngredientAmount per servingScore
L-Tyrosine
500 mg 100
Gluten Free Adults 18–50 Kosher Dairy Free
Report overview
Tyrosine · 500 mg OverallScore100
A+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value
500 mg of L-Tyrosine per serving is a substantial amount, with a very low estimated cost per gram of tyrosine. GMP manufacturing is claimed. The amount and form are clearly stated.
How this ingredient is rated

Active Ingredient Quality & Bioavailability100

It uses L-Tyrosine. A raw material grade claim is recorded, but its type is not specified.
Tyrosine Chemical Form
It uses L-Tyrosine.
Purity and Sourcing Signals
A raw material grade claim is recorded, but its type is not specified.

Dose, Safety & Label Transparency100

The serving provides 500 mg of L-Tyrosine, a substantial amount, and states the amount and source clearly.
Tyrosine Dosage Adequacy
A serving supplies 500 mg of L-Tyrosine, a substantial amount.
Label Transparency and Blends
The label states the tyrosine amount and source.

Value100

The estimated cost per gram of tyrosine is very low; it assigns the full serving cost to tyrosine.
Price per Gram of Tyrosine
The estimated cost per gram of tyrosine is very low; it assigns the full serving cost to tyrosine.
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