What is the recommended dose of L-Tyrosine?

- **Look for:** L-Tyrosine (free-form), 500-1,000mg per capsule, taken on empty stomach - **Avoid:** DL-Tyrosine (includes inactive form); NALT if specifically seeking brain dopamine support (less ...

Is L-Tyrosine safe to take daily?

L-Tyrosine is rated "Generally Safe" based on clinical evidence. Always consult your healthcare provider before starting any supplement.

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Ingredient Research

Graded against 173,636 supplements + 177 published clinical interactions, sourced from PubMed, FDA CAERS, openFDA, NIH DSLD

L-Tyrosine

MODERATE EVIDENCEAmino AcidLast updated

AVELOR SUMMARY

L-Tyrosine is the direct precursor to dopamine, norepinephrine, and epinephrine — the catecholamine neurotransmitters that govern focus, motivation, stress response, and executive function. Our research shows strong evidence for preserving cognitive performance under stress (sleep deprivation, cold exposure, multitasking) — military studies found it prevented the 50% cognitive decline normally caused by severe stress. For baseline cognitive enhancement in non-stressed individuals, the evidence is much weaker. This is a supplement that shines specifically when your catecholamine system is depleted.

WHAT IT DOES

Tyrosine is converted to L-DOPA by tyrosine hydroxylase (TH), then to dopamine by DOPA decarboxylase. During stress, the brain rapidly depletes dopamine and norepinephrine — the rate-limiting step is TH enzyme activity, which depends on tyrosine availability. By flooding the system with extra tyrosine during high-demand periods, you prevent the substrate depletion that causes cognitive decline. In non-stressed states, TH is already saturated with tyrosine, which is why supplementation doesn't help — you're adding fuel to a tank that's already full.

OPTIMAL DOSAGE

Look for: L-Tyrosine (free-form), 500-1,000mg per capsule, taken on empty stomach
Avoid: DL-Tyrosine (includes inactive form); NALT if specifically seeking brain dopamine support (less evidence); proprietary blends hiding dose
Minimum effective dose: 500mg for mild benefit; 2,000mg for stress-protection studies; military studies used 150mg/kg (~10g for 70kg person — not typical supplement dosing)
Third-party tested brands: NOW Foods, Thorne, Jarrow Formulas

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SAFETY PROFILE

Critical Interactions (Do Not Combine Without Medical Supervision)

Moderate Interactions (Monitor Closely)

Theoretical/Low-Risk Interactions

WHO SHOULD BE CAREFUL

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BCAAs / EAAs

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Independently graded against 173,636 indexed supplements with 177 published clinical interactions, sourced from PubMed, FDA CAERS, openFDA, and NIH DSLD | Last updated:

Not medical advice. Based on published clinical research and systematic reviews.

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