About Tyrosine
L-Tyrosine is a non-essential amino acid and direct precursor to dopamine, norepinephrine, and epinephrine. Also a building block for thyroid hormones (T3/T4). Research shows it preserves cognitive function under acute stress (cold, altitude, sleep deprivation) but does not enhance cognition at rest. N-Acetyl-L-Tyrosine (NALT) is a common but less bioavailable form — free-form L-Tyrosine is preferred. Up to 12 g/day cited as safe ceiling. Caution with MAOIs, levodopa, thyroid medications, and stimulants. No established RDA/UL.
What Tyrosine supports
- Preserves focus and working memory under stress
- Supports dopamine and norepinephrine production
- Precursor to thyroid hormones (T3/T4)
How much Tyrosine to take
Clinical studies typically use 500–2000 mg of Tyrosine. Common supplemental range 500-2000 mg/day. Clinical stress protocols use 100-150 mg/kg body weight as a single acute dose.
- Effective range
- 500–2000 mg
Clinical evidence
Moderate clinical evidence. Multiple trials show it preserves cognitive function under acute stress like cold or sleep deprivation
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