L-Tyrosine is an amino acid that serves as a building block for dopamine, epinephrine, and norepinephrine—neurotransmitters crucial for motivation, mental performance, and stress management. By supporting these key brain chemicals, L-Tyrosine helps maintain cognitive function during periods of stress or fatigue. Research shows it's particularly effective at preserving mental performance during challenging situations or when sleep-deprived, making it an essential component for sustainable energy and resilience throughout your day.