Resource Centre L-theanine in combination to caffeine

Tea is the second most frequently consumed beverage in the world. In many countries, consumers associate tea consumption with mental and physical benefits. Unilever R&D is conducting scientific research to better understand the benefits of tea and its ingredients and why it is a healthy choice of hydration.


L-theanine and caffeine are two important ingredients of tea. L-Theanine is an amino acid, which is virtually only found in tea and has been shown to influence brain activity. Caffeine is a well-known stimulant.


Prior studies suggested interactive cognitive effects of the the L-theanine and caffeine combination. This present study further investigated whether L-theanine, in combination with caffeine, can help to improve performance of cognitive tasks and whether it increases feelings of alertness. Download the research document to find out more.


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