Can You Take L-DOPA (Levodopa) and L-Norvaline Together?

Use extra care with this pair

The short answer

L-Norvaline inhibits arginase, increasing arginine availability and downstream NO production. L-DOPA metabolism also generates reactive oxygen species. The combination of increased NO and L-DOPA metabolites may amplify oxidative stress.

How to arrange timing

Use caution when combining L-Norvaline with L-DOPA. Consider additional antioxidant support if using both.

Reference

Reference noted for this combination: Reczkowski RS, Bhatt D. Kinetic analysis of the role of arginase. Arch Biochem Biophys. 1994;312(1):31-37.

Important context

Whether supplements suit you together also depends on dose, product formulation, health conditions, and medication use. Ask a doctor or pharmacist first if you take medication, are pregnant or breastfeeding, or have a chronic condition.