L-Tyrosine Caps 500 mg

L-Tyrosine Caps 500 mg

Country Life4.7 (1,025 ratings)
Format:Capsule Quantity: 100 Capsule(s) · 100 servings
Goals
$19.19 $0.19 per serving
iHerbLowest$19.19Pure Formulas$19.19Amazon$19.19Vitacost$19.19

About this product

Free-form L-tyrosine at 500 mg provides focused catecholamine-precursor support in a convenient capsule. Vitamin B6 provides a relevant cofactor for neurotransmitter metabolism, and value is reasonable.

The formula remains narrow and offers no sourcing or purity assurance. 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
  • Reasonable practical value

Cons

  • The formula remains narrow and offers no sourcing or purity assurance
  • 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

Product analysis

81 out of 100
The core formula provides a clearly defined role with practical strengths. The formula remains narrow and offers no sourcing or purity assurance.

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

Nutrient quality86

L-tyrosine is paired with a relevant vitamin B6 cofactor at practical amounts. The formula is coherent, though vitamin B6 is high relative to daily need.

Ingredient transparency85

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 satisfaction69

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 money81

A useful tyrosine amount and relevant cofactor support good formula value. The capsule compares reasonably well with similar focused options.

Format
Capsule
Container
100 Capsule(s)
Per serving
$0.19
Customer rating
4.7 · 1,025 ratings
Report analysis

Goals

Brain Health
Brain Health
Impact
High effect
B Ingredient FitD- PathwaysA EvidenceA+ Formulation Logic
Vitamin B6 · 8.5 mg

Tyrosine is involved in making brain signalling chemicals, but that role does not show that taking it improves everyday cognition. Benefits connected to acute stress or sleep loss do not imply better thinking when rested or long-term brain protection. Vitamin B6 adds an essential nutrient, without demonstrating an extra cognitive benefit when intake is adequate.

How this product is rated for Brain Health

Ingredient fit78

Tyrosine is involved in making brain signalling chemicals, but that role does not show that taking it improves everyday cognition.
Goal fit
Tyrosine is involved in making brain signalling chemicals, but that role does not show that taking it improves everyday cognition.
Dose adequacy
Tyrosine: 500 mg; Vitamin B6: 8.5 mg per serving. These amounts do not predict individual benefit.

Pathways43

Tyrosine and vitamin B6 relate to making brain signalling chemicals; that mechanism does not demonstrate cognitive improvement.
Depth
Tyrosine and vitamin B6 relate to making brain signalling chemicals; that mechanism does not demonstrate cognitive improvement.
Breadth
The ingredient roles do not show broad improvements across memory, attention and long-term brain health.

Evidence92

Tyrosine is involved in making brain signalling chemicals, but that role does not show that taking it improves everyday cognition. Preparation and personal circumstances can limit how well a benefit applies.
Evidence strength
Tyrosine is involved in making brain signalling chemicals, but that role does not show that taking it improves everyday cognition.
Studied preparation
The declared preparation does not by itself guarantee a cognitive benefit.

Formulation logic100

No particular conflict or missing required partner is identified. Combining the ingredients does not itself show an added cognitive benefit.
Partner coverage
No required ingredient partner is missing for the relevant ingredient roles.
Conflicts
No particular ingredient conflict is identified for this goal.
Effective doses
Declared amounts allow comparison with ingredient reference amounts, but do not prove cognitive improvement.
Study evidence
Tyrosine Supportive 7 studies
Vitamin B6 Supportive 29 studies

Ingredients

IngredientAmount per servingScore
Vitamin B6 (Pyridoxine Hydrochloride)
 8.5 mg
L-Tyrosine
500 mg 90
Gluten Free Adults 18–50 Kosher Dairy Free Sugar Free Halal Vegetarian
Report overview
Tyrosine · 500 mg OverallScore90
A- Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyB+ Value
L-Tyrosine Caps clearly lists 500 mg of L-tyrosine per serving, at the start of the supplied standard dose range. The saved facts note GMP manufacturing but no specific purity, testing, or fermentation information. Its cost per gram falls in a moderate supplied band.
How this ingredient is rated

Active Ingredient Quality & Bioavailability85

It uses the standard L form described in the supplied context, with a GMP manufacturing signal recorded.
Tyrosine Chemical Form
The label identifies L-tyrosine, the standard free form described in the supplied context.
Purity and Sourcing Signals
GMP manufacturing is recorded, but no specific purity, third-party testing, or fermentation detail appears.

Dose, Safety & Label Transparency100

The stated amount is within the supplied standard range, and the form is clearly named.
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 lists its exact amount.

Value80

The cost per gram falls in a moderate supplied band.
Price per Gram of Tyrosine
Its cost per gram is in the supplied middle cost band.
View ingredientView products
Loading alternative details
85 Performance

L-Tyrosine 500 mg

Natural Factors

A 1,000 mg L-tyrosine serving provides one of the most substantial focused amounts in the supplied set. Compared with the original, tyrosine dose or cognitive-support depth is stronger or more clearly targeted, though raw-material testing and complete inactive-ingredient details are not supplied.

86 Performance

L-Tyrosine 750 mg - Extra Strength

NOW

A substantial 750 mg L-tyrosine amount provides more active depth than most basic 500 mg capsules. Compared with the original, tyrosine dose or cognitive-support depth is stronger or more clearly targeted, though raw-material sourcing and purity assurance remain unspecified.

72 Performance

DopaPlus

Pure Encapsulations

Tyrosine at 1,000 mg is paired with active vitamin B6, methylfolate, mucuna, standardized rhodiola, grape polyphenols, and green-tea catechins. Compared with the original, tyrosine dose or cognitive-support depth is stronger or more clearly targeted, though mucuna-derived L-Dopa may interact with dopaminergic or antipsychotic medicines and the formula is costly to use routinely.

85 Budget

L-Tyrosine Powder

Source Naturals

Bulk L-tyrosine supplies a meaningful 660 mg amount with flexible serving adjustment. Routine cost is lower than the original, though measuring powder is less precise than using a capsule and purity testing is not supplied.

84 Budget

L-Tyrosine

NOW

Bulk L-tyrosine offers a simple, flexible format with 350 mg per listed serving. Routine cost is lower than the original, though the amount is modest and measuring bulk material is less precise than using a capsule.

85 Budget

Best L-Tyrosine 500 mg

Doctor's Best

Free-form L-tyrosine is clearly identified at a practical 500 mg amount in a focused capsule. Routine cost is lower than the original, though raw-material sourcing and purity assurance are not supplied.

86 Value

L-Tyrosine 500 mg

NOW

A focused 500 mg L-tyrosine capsule offers a practical amount without unrelated actives. The active design and routine serving economics create a useful value trade-off versus the original, though raw-material sourcing and purity assurance are unavailable.

85 Value

L-Tyrosine 500 mg

Jarrow Formulas

A focused 500 mg L-tyrosine capsule supplies a practical amount for acute cognitive demand. The active design and routine serving economics create a useful value trade-off versus the original, though quality-assurance and raw-material details are missing.

83 Value

L-Tyrosine 500 mg

Source Naturals

A practical 500 mg L-tyrosine amount is supplied in a simple tablet. The active design and routine serving economics create a useful value trade-off versus the original, though the added calcium offers little targeted benefit and raw-material assurance is absent.

Report alternatives

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
  6. Vitamin B12, B6, or Folate and Cognitive Function in Community-Dwelling Older Adults: A Systematic Review and Meta-Analysis.
    Zhang C; Luo J; Yuan C; Ding D · Journal of Alzheimer's disease : JAD · 2021
    Meta-analysis21 studies pooledBrain Health forVitamin B6
  7. Relationship between serum pyridoxal 5'-phosphate concentration and cognitive function in older Japanese.
    Itoh K; Kuwabara A; Otsuka R; Sugimoto T; Sakurai T; Niida S; Ao M; Tanaka K; Takenaka S; Kanouchi H · Journal of clinical biochemistry and nutrition · 2025
    Cross-sectional study266 participantsBrain Health forVitamin B6
  8. A randomized, controlled trial to evaluate the efficacy of pyridoxine and ascorbic acid on cognitive function and quality of life in post-menopausal women.
    Dhivya K; Sarumathy S; Manigandan G · Naunyn-Schmiedeberg's archives of pharmacology · 2025
    Randomized trial180 participantsBrain Health forVitamin B6
  9. Lower Plasma Vitamin B-6 is Associated with 2-Year Cognitive Decline in the Boston Puerto Rican Health Study.
    Palacios N; Scott T; Sahasrabudhe N; Gao X; Tucker KL · The Journal of nutrition · 2020
    Cohort study949 participantsBrain Health forVitamin B6
  10. Are Dietary Supplements and Nutraceuticals Effective for Musculoskeletal Health and Cognitive Function? A Scoping Review.
    Iolascon G; Gimigliano R; Bianco M; De Sire A; Moretti A; Giusti A; Malavolta N; Migliaccio S; Migliore A; Napoli N; Piscitelli P; Resmini G; Tarantino U; Gimigliano F · The journal of nutrition, health & aging · 2017
    Scoping review12 studies pooledBrain Health forVitamin B6