High Tyrosine Tied to Nearly One-Year Less Male Life — SkimNews
Get the Health newsletter
Daily health & science — research, biotech, public health, the studies worth knowing. Free.
- The UK Biobank study analyzed more than 270,000 participants using observational comparisons and Mendelian randomization to investigate links between phenylalanine, tyrosine, and lifespan.
- Higher phenylalanine levels initially appeared associated with increased death risk, but phenylalanine showed no lifespan association in either sex after researchers controlled for tyrosine.
- Tyrosine was the amino acid that consistently stood out in the closer analysis, with genetically higher levels estimated to shorten men’s life expectancy by nearly one year.
- The male-specific association was absent in women, while men generally had higher tyrosine levels; the study did not establish tyrosine as the cause of the sex longevity gap.
- Insulin resistance was one proposed mechanism connecting tyrosine to aging, while sex differences in stress-response signaling were offered as another possible explanation requiring further investigation.
- The research did not directly test tyrosine supplements, examining blood concentrations and genetically influenced body levels instead of the effects of marketed focus and mental-performance products.
Why it matters: Supplement buyers are the practical stakeholder: no tyrosine product was tested, so the nearly one-year estimate applies to genetically elevated body levels, not a proven effect of marketed focus aids. Insulin resistance and sex-specific stress signaling remain hypotheses, leaving the result as a research clue rather than a safety verdict.
Ask SkimNews
