L-tyrosine is a precursor of dopamine, adrenaline and noradrenaline, which produces a wide range of effects at a central and systemic level. At a central level, it's associated with a higher concentration, improving cognitive processes and memory. On the other hand, it's known to contribute to losing fat along with other stimulant substances like caffeine or ephedrine. As it affect catecholamine levels, it might affect blood pressure negatively, however, there is no evidence of this happening.  

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