L-Tyrosine is a non-essential amino acid that acts as a precursor to catecholamine neurotransmitters, including dopamine, norepinephrine, and epinephrine. Its primary relevance to healthspan is not direct lifespan extension but rather supporting cognitive resilience during acute stress. By replenishing neurotransmitters depleted by stress, it may help mitigate the long-term neurological wear-and-tear associated with chronic stress responses.
Verdict
A useful tool for cognitive support during acute stress, not foundational.
HEALTHSPAN IMPACT
Experimental
RISK LEVEL
Low
EVIDENCE GRADE
B
MONTHLY COST
$5 - $20
Protocol
- Take 500-2000 mg 30-60 minutes before acute stressors to support cognitive function.
Flags
- Avoid if taking MAOI antidepressants due to risk of hypertensive crisis.
- May interact with thyroid hormone medication; consult a physician if you have a thyroid condition.
- Can interfere with levodopa (L-DOPA) medication used for Parkinson's disease.
- High doses (>150mg/kg bodyweight) may cause nausea, headache, or fatigue.