The Claim
Daily supplementation with L-glutamine at a dosage of 0.3 g/kg body weight for three weeks in combat-sport athletes attenuates the decline in salivary testosterone and prevents the reduction in testosterone-to-cortisol ratio following intense training.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In combat-sport athletes, taking L-glutamine daily at 0.3 grams per kilogram of body weight for three weeks reduces the drop in salivary testosterone and maintains the testosterone-to-cortisol ratio after intense training.
See the scientific wording
Three weeks of daily L-glutamine supplementation at 0.3 g/kg body weight in combat-sport athletes likely attenuates the decline in salivary testosterone and prevents the reduction in testosterone-to-cortisol ratio that typically occurs after intense training, suggesting a probable benefit to anabolic-catabolic balance.
L-glutamine strengthens the gut lining, preventing bacterial toxins from entering the bloodstream. This reduces overall body inflammation, which stops the stress system from overproducing cortisol. With less stress signaling, the body maintains normal testosterone production, keeping the balance between muscle-building and muscle-breaking hormones intact.
What the research says
1 studyThis study found that combat athletes who took L-glutamine daily for three weeks during tough training kept their testosterone levels up and cortisol levels down, while those who didn’t take it saw the opposite — meaning glutamine helped their bodies stay in better balance during stress.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.