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Best L-Tyrosine 500 mg

Doctor's Best
4.7
★ ★ ★ ★ ★
(5341 ratings)
Tyrosine 500 mg
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Score85
The core formula provides a clearly defined role with practical strengths. No branded source, purity grade, or sourcing assurance is provided.
How scoring works
Quantity:120 Veggie Cap(s) • (120 servings)
Goals:
Brain Health

Score 85

The core formula provides a clearly defined role with practical strengths. No branded source, purity grade, or sourcing assurance is provided.
How scoring works
$12.38($0.10 per serving)
Amazon
$ 14.99
Pure Formulas
$ 12.38
Vitacost
$ 14.99
iHerb
$ 14.99
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Analysis

Free-form L-tyrosine at 500 mg provides focused catecholamine-precursor support in a convenient veggie capsule. The single-active formula keeps its role clear, and value is favorable.

No branded source, purity grade, or sourcing assurance is provided. Benefits are most relevant during acute stress, sleep loss, or demanding work rather than as broad daily brain support.

It fits adults seeking situational support for attention and working performance. Users wanting memory, structural, or long-term neuroprotective coverage need a broader formula.

Who is it for
  • adults seeking situational support for attention and working performance
  • Adults who understand the formula’s focused role
  • Users comfortable with the stated limitations
Best for
  • Acute mental-demand support
  • Situational focus support
  • 500 mg L-tyrosine use

Pros

  • Clearly disclosed 500 mg amount
  • Preferred L-tyrosine form
  • Favorable practical value

Cons

  • No branded source, purity grade, or sourcing assurance is provided
  • Situational rather than broad brain support
  • No complementary memory or structural nutrients

Warnings

  • L-tyrosine may conflict with levodopa, MAO inhibitors, or thyroid-hormone treatment
  • People with hyperthyroidism should avoid unsupervised tyrosine use
  • Tyrosine can feel stimulating or cause digestive upset in sensitive users

Nutrient quality

89 Highest impact

Free-form L-tyrosine is well matched to focused tyrosine use. The amount is practical, and the single-active formula avoids unnecessary additions.

Ingredient transparency

86 Highest impact

The active ingredient and its amount are clearly disclosed without a hidden blend. Full intake directions and the non-active ingredient list are not present in the supplied details.

Customer satisfaction

72 High impact

The aggregate rating is strong, and the large review volume makes it dependable. No detailed feedback is supplied to assess recurring complaints or purpose-specific experiences.

Value for money

90 Highest impact

A meaningful amount and focused formula support good serving value. The product compares favorably with similar capsule options.

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Goals

Brain Health
Brain Health
Impact
High effect
C+ Goal FitA- Strength of SupportD CoverageA Formula Quality

L-tyrosine may help preserve focus during acute mental strain because it supplies a direct catecholamine precursor. Its benefit is situational and does not provide broad structural or long-term neurological support.

The 500 mg amount is clearly disclosed and falls in a practical range for acute cognitive demand. No branded source, purity testing, or sourcing assurance is provided.

Study evidence
Tyrosine Supportive 7 studies

Ingredients

IngredientAmount per serving
Tyrosine (L-Tyrosine)
 500 mg
Gluten Free Adults 18–50
Report overview
Tyrosine (L-Tyrosine) · 500 mg OverallScore84
B- Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyB+ Value

Free-form L-tyrosine is provided at a practical 500 mg dose that may support acute cognitive demand. The label clearly states the amount, but it gives no specific raw-material purity or sourcing assurance. Cost efficiency is favorable for the amount supplied.

View ingredientView products
Loading alternative details
92 Performance

L-Tyrosine 500 mg

Natural Factors
Its disclosed serving supplies 1,000 mg L-tyrosine with 50 mg calcium. The larger tyrosine amount and strong brain-health alignment provide more substantial single-serving support than the original single-ingredient tyrosine product, without making cost the deciding factor.
91 Performance

L-Tyrosine 750 mg - Extra Strength

NOW
Its focused capsule supplies 750 mg L-tyrosine per serving. The larger focused dose and strong nutrient-quality evidence make it a more capable option than the original single-ingredient tyrosine product, without making cost the deciding factor.
89 Performance

L-Tyrosine 500 mg

Jarrow Formulas
Its focused capsule supplies 500 mg L-tyrosine per serving. Its strong brain-health alignment and fully disclosed single-active design compare favorably with the original single-ingredient tyrosine product, without making cost the deciding factor.
97 Budget

L-Tyrosine Powder

Source Naturals
Its powder supplies 660 mg L-tyrosine per serving with no unrelated active ingredients. Its lower recurring cost gives it a more economical profile than the original single-ingredient tyrosine product while retaining a fully disclosed tyrosine amount.
93 Budget

L-Tyrosine

NOW
Its liquid supplies 350 mg L-tyrosine per serving across 323 servings. Its lower recurring cost gives it a more economical profile than the original single-ingredient tyrosine product while retaining a fully disclosed tyrosine amount.
88 Budget

L-Tyrosine 500 mg

Swanson
Its capsule supplies 500 mg L-tyrosine in a focused single-active formula. Only 3 eligible candidates are strictly cheaper, so this is one of the closest low-cost allowed matches to the original single-ingredient tyrosine product.
95 Value

L-Tyrosine 500 mg

NOW
Its focused capsule supplies 500 mg L-tyrosine across 120 servings. Its strong collection fit and value evidence give it a better quality-to-cost balance than the original single-ingredient tyrosine product.
86 Value

L-Tyrosine 500 mg

Solgar
Its focused capsule supplies 500 mg L-tyrosine per serving. Its focused formula and strong ingredient transparency preserve quality while offering competitive value against the original single-ingredient tyrosine product.
87 Value

L-Tyrosine 500 mg

Source Naturals
Its tablet supplies 500 mg L-tyrosine with 114 mg calcium. Its disclosed tyrosine amount and solid value evidence offer a practical balance compared with the original single-ingredient tyrosine product.
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Sources

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

  1. 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
  2. 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
  3. 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
  4. 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
  5. 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