AI Insight
A study of over 270,000 participants found that elevated blood levels of tyrosine, an amino acid commonly sold as a cognitive supplement, are associated with reduced lifespan in men by nearly one year. The research employed both observational data and genetic analysis to establish this correlation, though notably no significant effect was observed in women. Tyrosine occurs naturally in protein-rich foods and is marketed to enhance focus and mental performance.
Why it matters
This finding raises important safety questions about tyrosine supplementation, particularly for men who take it to improve cognitive function. The sex-specific nature of the effect suggests biological differences in tyrosine metabolism that warrant further investigation and may influence supplement recommendations.
Understand the Science
A large study involving more than 270,000 people has linked higher blood levels of the amino acid tyrosine to a shorter lifespan in men. Using both observational data and genetic analysis, researchers found that elevated tyrosine could potentially reduce male life expectancy by nearly a year, while no significant effect appeared in women. Tyrosine is found naturally in protein-rich foods and is also sold as a supplement for boosting focus and mental performance, making the finding especially intriguing.
Source: Popular brain supplement linked to shorter lifespan in men