MODERATE — Monitor Closely
TIMING CRITICAL — separate by 2+ hours; high-protein meals also compete
Evidence level: MODERATE
Tyrosine supplements compete with levodopa for absorption — taking them together means less Parkinsons medication reaches your brain.
Tyrosine and levodopa share the same large neutral amino acid transporter (LAT1) for both intestinal absorption and blood-brain barrier transport. Competition reduces levodopa delivery to brain.
Take tyrosine supplements at least 2 hours apart from levodopa. Similarly, high-protein meals should be separated from levodopa doses.
Take Tyrosine on an empty stomach between meals for optimal absorption — amino acids compete with dietary protein for transport. Levodopa follows its prescribed schedule. Space them at least 1 hour apart.
High-protein diet, concurrent amino acid supplements
Motor fluctuations, wearing-off, reduced medication effectiveness
Discuss protein redistribution diet strategy. Timing of amino acid supplements relative to medication.
Discuss safer alternatives with your healthcare provider. They can recommend substitutions based on your specific health goals while minimizing interaction risks. Always bring a complete list of everything you take to your appointments.
Tyrosine supplements compete with levodopa for absorption — taking them together means less Parkinsons medication reaches your brain.
Take Tyrosine on an empty stomach between meals for optimal absorption — amino acids compete with dietary protein for transport. Levodopa follows its prescribed schedule. Space them at least 1 hour apart.
Motor fluctuations, wearing-off, reduced medication effectiveness
Discuss safer alternatives with your healthcare provider. They can recommend substitutions based on your specific health goals while minimizing interaction risks. Always bring a complete list of everything you take to your appointments.
Discuss protein redistribution diet strategy. Timing of amino acid supplements relative to medication.
Or browse the full interaction database (121,000+ pairs).