L-tyrosine
NALT / N-acetyl L-tyrosine · Brain
Dopamine precursor studied under acute stress — cold, sleep loss, heavy multitasking.
What the evidence says
Small human trials show benefit specifically under acute stressors. There is little evidence it does anything on a normal, rested day.
What studies used
500–2,000 mg. 30–60 min before the demand.
Reported from published studies and product labelling — a record of what was used in research, not a recommendation. What is right for you is a conversation with a clinician.
Evidence base
established literature
Strong human evidence: either a phase 3 or 4 trial report alongside review-level evidence, or ten or more randomised controlled trial reports.
This letter measures how much human research exists, not whether it works for you — the tier above (Limited) is the read on quality.
Research (12)
- Recent advances in biocatalytic derivatization of L-tyrosineAppl Microbiol Biotechnol · 2020
- O-(2-[18F]-Fluoroethyl)-L-Tyrosine (FET) in Neurooncology: A Review of Experimental ResultsCurr Radiopharm · 2019
- Yeast: A platform for the production of (L) -tyrosine derivativesYeast · 2023
- L-Tyrosine Limits Mycobacterial Survival in Tuberculous GranulomaPathogens · 2023
- Current trends in the use of O-(2-[(18)F]fluoroethyl)-L-tyrosine ([(18)F]FET) in neurooncologyNucl Med Biol · 2021
- l-tyrosine modulates biofilm formation of Bacillus cereus ATCC 14579Res Microbiol · 2023
- Terahertz tyrosine modesSpectrochim Acta A Mol Biomol Spectrosc · 2023
- Towards defining receptors for L-tyrosine and L-dopaMol Cell Endocrinol · 1994
- Enhancing the efficiency of L-tyrosine by repeated batch fermentationBioengineered · 2020
- Production of L-tyrosine using tyrosine phenol-lyase by whole cell biotransformation approachEnzyme Microb Technol · 2019
- N-Acetyl-3,5-dibromo-l-tyrosine hemihydrateActa Crystallogr Sect E Struct Rep Online · 2012
- L-tyrosine in depressionLancet · 1980
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