🧠Focus

l-tyrosine

L-tyrosine is a precursor to neurotransmitters like dopamine and norepinephrine, enhancing cognitive function under stress.

Clinical Dose: 1gFound in: 100 products

What Does L-Tyrosine Do?

L-Tyrosine is a non-essential amino acid and precursor to the catecholamines dopamine, norepinephrine, and epinephrine. It is a key focus and mood ingredient in pre-workouts.

  • Enhanced Focus Under Stress: Replenishes catecholamine stores depleted during intense physical or mental stress.
  • Improved Cognitive Performance: Supports working memory, attention, and mental clarity.
  • Mood Support: As a dopamine precursor, it may support motivation and well-being during demanding training.
  • Synergy with Caffeine: Often paired with caffeine to extend and smooth out stimulant effects.

Clinical vs. Gym Bro Dosing

TierDoseNotes
Clinical Minimum500 mgMild cognitive support
Standard Effective1,000–2,000 mgThe research-backed range for stress and focus
High Performance2,000–3,000 mgCommon in focus-heavy pre-workout formulas
NALT Alternative300–600 mgN-Acetyl-L-Tyrosine is more bioavailable but less studied

Key Insight: Free-form L-Tyrosine at 1–2g is the preferred form. NALT (N-Acetyl L-Tyrosine) is sometimes used but has lower conversion rates.

Side Effects & Warnings

  • Generally Safe: L-Tyrosine is well-tolerated at standard doses.
  • Headache: Rare, but possible at very high doses.
  • Interaction with MAOIs: Tyrosine can interact with monoamine oxidase inhibitors. Do not combine.
  • Thyroid Medication: Tyrosine is a precursor to thyroid hormones. Consult a physician if on thyroid medication.

Contraindications: Individuals taking MAOIs or thyroid medication should consult a doctor before supplementing.