Can You Take 5-HTP and Gamma-Butyrolactone Together?

Use extra care with this pair

The short answer

Gamma-Butyrolactone (GBL) is a prodrug of GHB, which affects GABA and dopamine systems. 5-HTP increases serotonin. Combining substances that affect multiple neurotransmitter systems simultaneously creates unpredictable interactions and increased risk of adverse effects.

How to arrange timing

Avoid combining GBL with 5-HTP. Both affect distinct but interconnected neurotransmitter systems, creating compounding risks.

Reference

Reference noted for this combination: Snead OC, Gibson KM. Gamma-hydroxybutyric acid. N Engl J Med. 2005;352(26):2721-2732.

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.