New Study Finds a Common Supplement Ingredient May Lead to a Shorter Lifes

A common supplement ingredient may have some unwanted side effects. While many high performers use L-tyrosine to manage stress and improve their memory, new data suggests that they may be harming their long-term health by doing so.

A new study found that men with higher levels of tyrosine, which is commonly used to enhance cognitive function, had a shorter lifespan, raising questions about the efficacy of popular dietary supplements, including ashwagandha and lion's mane mushroom.

Scientists from the University of Hong Kong and the University of Georgia analyzed data from over 250,000 individuals registered in the UK Biobank, a large health database that collects and stores medical information from volunteers. The study, which was published in Aging last fall, found that men who had genetically higher tyrosine levels lived, on average, one year less than those with normal levels.

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