Strong evidenceamino_acid
L-Tyrosine for Lack of Focus
L-tyrosine is the direct precursor to dopamine and norepinephrine via tyrosine hydroxylase. Under stressful conditions, catecholamine turnover increases and tyrosine supplementation prevents depletion, maintaining focused attention.
How strong is the research?
Strong evidence
Based on a randomised controlled trial (RCT) — the gold standard for establishing cause and effect.
Research source
SourceDeijen JB et al. · Brain Research Bulletin 1999How much to take
500–1000 mg
Take 30-60 minutes before meals. Most effective under conditions of stress, sleep deprivation, or high cognitive demand.
When to take it
Best taken: morning