Longevity & AgingPopular Brain Supplement Tyrosine Linked to Nearly a Year of Lost Lifespan in Men
A large study using UK Biobank data found that men with higher blood levels of tyrosine — an amino acid commonly taken in brain and focus supplements — may live nearly a year less than those with lower levels. Researchers analyzed over 270,000 participants and used Mendelian randomization, a genetic technique that strengthens causal inference, to confirm the association. Women showed no such pattern. Tyrosine is widely found in protein-rich foods and sold in supplements marketed for dopamine support, mood, and cognitive performance. While the finding doesn't prove tyrosine directly causes early death, it raises meaningful questions for men who regularly supplement with it and warrants closer scientific attention.
