By Tarun Sai Lomte Reviewed by Susha Cheriyedath, M.Sc. Jun 23 2026 A new crossover trial suggests that daily L-tyrosine was well tolerated in healthy men, but researchers caution that safety beyond 4 weeks, at higher doses, and across more diverse groups remains untested. Study: Evaluation of the Safety and Tolerability of L-Tyrosine Supplementation in Healthy Adult Men: A Randomized Crossover Trial . Image Credit: StudioMolekuul / Shutterstock A recent study published in the journal