Supplement
L-Glutamine
L-glutamine may help strengthen the gut barrier that estrogen decline tends to weaken, with small studies showing reduced intestinal permeability and inflammation. The evidence comes mainly from athletes and critically ill patients rather than healthy menopausal women, though the biological rationale is sound. Food sources provide meaningful amounts, and supporting gut health during this transition makes sense even while we wait for better research.
30-second summary
L-glutamine may help strengthen the gut barrier that estrogen decline tends to weaken, with small studies showing reduced intestinal permeability and inflammation. The evidence comes mainly from athletes and critically ill patients rather than healthy menopausal women, though the biological rationale is sound. Food sources provide meaningful amounts, and supporting gut health during this transition makes sense even while we wait for better research.
digestive issues — mixedinflammation — weak
Overall: Mixed evidence
Randomised controlled trials
Small trials show gut barrier benefits in athletes and critically ill patients, but no trials specifically in healthy menopausal women.
Limited observational data on L-glutamine and gut health in general populations.
Meta-analyses support gut barrier protection and immune function, primarily in clinical populations.
Menopause-specific trials
No studies have specifically examined L-glutamine supplementation in menopausal or postmenopausal women.
What we do not know
No large randomized trials have studied L-glutamine specifically in menopausal women. The optimal dose for gut health in healthy adults is not established - most studies use 5-30g daily for various conditions. We don't know how long supplementation needs to continue for sustained benefits. Most gut barrier studies last only 2-8 weeks. We also lack data on how L-glutamine interacts with hormone therapy or other menopause treatments.
How it is used
Common dose range
5-15g daily
Notes on dosing
Mix in cool water — heat destroys glutamine. Take on an empty stomach for gut health. Start at 5g and increase slowly.
Get it from food first
Food sources are better absorbed than most supplements and come with co-factors that support the same pathways. If you eat two or three of these consistently, you may not need a supplement at all.
bone broth
8 oz
highest food source, varies by preparation
chicken breast
3.5 oz
about 3.5g glutamine
beef
3.5 oz
about 3.2g glutamine
fish
3.5 oz
about 2.8g glutamine
eggs
2 large
about 1.3g glutamine
milk
1 cup
about 0.7g glutamine
Protein-rich eating
emphasizes complete proteins that naturally provide glutamine along with other amino acids
Traditional cooking
includes bone broths and slow-cooked meats that concentrate glutamine
What depletes L-Glutamine
Prolonged stress increases glutamine demand. Intense exercise depletes glutamine stores. Some chemotherapy drugs and corticosteroids can reduce glutamine levels. Alcohol may interfere with glutamine metabolism.
Interactions and cautions
No significant interactions noted at recommended doses.
Rose bottom line
"Your gut lining deserves attention during menopause, and L-glutamine offers a reasonable approach with biological plausibility behind it. Start with food sources like bone broth and lean proteins, and consider that other gut-supporting strategies have stronger evidence - like fiber, fermented foods, and stress management."