Can You Take GABA and L-Serine Together?

Use extra care with this pair

The short answer

L-Serine is a precursor for phosphatidylserine which modulates GABA receptor sensitivity. Combining L-Serine with GABA supplements may potentiate GABAergic inhibitory effects, leading to enhanced sedation.

How to arrange timing

Use lower doses when combining L-Serine and GABA. Monitor for excessive sedation, especially when taken before sleep.

Reference

Reference noted for this combination: Kakee A, et al. Efflux of a suppressive neurotransmitter, GABA, across the blood-brain barrier. J Neurochem. 2001;79(1):110-118.

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.