Bernard O'Shea: I tried the brain supplement L-Tyrosine to increase my focus

Recently, L-Tyrosine has caught my attention as a possible supplement for improving cognitive function.

Bernard O'Shea. Photograph Moya Nolan

Brain supplements have become increasingly popular recently as people seek natural ways to boost their cognitive function and mental performance. But using supplements to improve brain function is not a new concept. Humans have been using various substances for centuries to enhance their mental abilities.

One of the earliest examples of brain supplements is my heart-murmuring favourite, caffeine, which has been used for stimulating effects since ancient times.