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L-Tyrosine 500 mg

Source Naturals
4.7
★ ★ ★ ★ ★
(2232 ratings)
Tyrosine 500 mg
Product Image
Score83
The core formula provides a clearly defined role with practical strengths. No raw-material sourcing or purity verification is supplied.
How scoring works
Quantity:100 Tablet(s) • (100 servings)
Goals:
Brain Health

Score 83

The core formula provides a clearly defined role with practical strengths. No raw-material sourcing or purity verification is supplied.
How scoring works
$10.03($0.10 per serving)
Vitacost
$ 10.03
Amazon
$ 10.50
Pure Formulas
$ 11.12
iHerb
$ 11.75
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Analysis

Free-form L-tyrosine at 500 mg provides focused catecholamine-precursor support in a convenient tablet. The small calcium addition does not distract from the focused amino-acid purpose, and value is favorable.

No raw-material sourcing or purity verification is supplied. 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 raw-material sourcing or purity verification is supplied
  • 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

87 Highest impact

Free-form L-tyrosine is well aligned with targeted use. The practical amount is reasonable, though added calcium contributes little to focused tyrosine support.

Ingredient transparency

85 Highest impact

Both listed active amounts are disclosed without a hidden blend. Full intake directions and the non-active ingredient list are not present in the supplied details.

Customer satisfaction

70 High impact

The aggregate rating is strong, and the review volume provides solid confidence in it. No detailed feedback is supplied to assess recurring complaints or purpose-specific experiences.

Value for money

89 Highest impact

A practical tyrosine amount supports strong serving value. Added calcium has limited relevance but does not prevent favorable category competitiveness.

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Goals

Brain Health
Brain Health
Impact
High effect
B Goal FitB Strength of SupportD+ CoverageA Formula Quality

L-tyrosine may preserve focus and working memory when acute stress depletes catecholamine neurotransmitters. Its benefit is situational rather than broad neuroprotection for unstressed users.

The 500 mg amount is a practical starting dose with clear standalone disclosure. The formula remains limited to one neurotransmitter-precursor pathway.

Study evidence
Tyrosine Supportive 7 studies

Ingredients

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

Clearly identified L-tyrosine provides the preferred form at a standard 500 mg amount. The label gives the dose as a standalone ingredient, but no raw-material sourcing or purity verification is supplied. Cost per gram is favorable, making it a practical option for targeted tyrosine use.

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 tyrosine-and-calcium tablet, 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 tyrosine-and-calcium tablet, 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 tyrosine-and-calcium tablet, 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 tyrosine-and-calcium tablet 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 tyrosine-and-calcium tablet while retaining a fully disclosed tyrosine amount.
90 Budget

Best L-Tyrosine 500 mg

Doctor's Best
Its veggie capsule supplies 500 mg of explicitly identified L-tyrosine across 120 servings. Only 3 eligible candidates are strictly cheaper, so this is one of the closest low-cost allowed matches to the original tyrosine-and-calcium tablet.
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 tyrosine-and-calcium tablet.
89 Value

L-Tyrosine 500 mg

Swanson
Its capsule supplies 500 mg L-tyrosine in a focused single-active formula. Its focused formula and solid value evidence make it a practical quality-to-cost alternative to the original tyrosine-and-calcium tablet.
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 tyrosine-and-calcium tablet.
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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. 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
  5. 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