Studies related to Dopamine and L-Tyrosine

Effects of tyrosine supplementation ration on anaerobic sports capacity and plasma catecholamine levels in soccer athletes
Effect None
Values Plasma. ng/ml. Mean and SEM. Placebo first. Placebo: before 69.12 ± 12.79, after 89.44 ± 13.91. Tyrosine: before 107.42 ± 11.39 after 121.39 ± 9.31. Tyrosine first: Placebo: before 55.23 ± 5.23, after 78.11 ± 14.97. Tyrosine: before 106.21 ± 12.11 after 110.04 ± 9.73.
Trial Design Randomized trial
Trial Length 1-2 Weeks
Number of Subjects 14
Sex Male
Notes for this study:
In this randomized, single-blind crossover trial, 14 soccer players took 2 g of tyrosine daily or placebo for 2 weeks before crossing over.

On a Wingate cycling test, tyrosine failed to produce improvements in peak power, power maintenance, and mean power. Were wasn't a statistically significant difference in heart rate, lactic acid, blood glucose, noradrenaline, or dopamine. Epinephrine was reduced more when taking tyrosine for those who took it first but not those who took it second.
Funding issues for this study:
Not declared.

Full details on all 2 studies are available to Examine Members. Try out the Examine Membership with a 14-day free trial.

Already a Member? Log in now to access.