Can You Take Glutamine Peptides and L-Glutamine Together?

May affect absorption

The short answer

Glutamine peptides and L-glutamine both provide glutamine to the body. Stacking them may result in total glutamine intake exceeding beneficial thresholds, potentially causing GI discomfort at high doses.

How to arrange timing

Choose one glutamine source. If combining, count total glutamine from both sources and keep within 20–30 g/day.

Reference

Reference noted for this combination: Gleeson M. Dosing and efficacy of glutamine supplementation in human exercise and sport training. J Nutr. 2008;138(10):2045S-2049S

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.