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Moderate Evidence🦠

Best L-Glutamine for Gut Health in Australia

Amino acid that supports gut lining integrity and immune function. Compare prices across Australian retailers and find the best value.

Full L-Glutamine profile — evidence, interactions & all conditions

Quick Summary

Dosage

5-10 g/day

Time to Effect

4-8 weeks

From

$0.12/serve

Evidence

moderate (3/5)

Timing: Take on empty stomach

Clinical Evidence

L-glutamine supplementation reduces intestinal permeability in IBS patients

rct2019n=106

Multicentre RCT found 15g/day L-glutamine for 8 weeks significantly reduced intestinal permeability and IBS symptom severity compared to placebo.

How Does L-Glutamine Help with Gut Health?

L-Glutamine is the primary fuel source for enterocytes (intestinal cells) and helps maintain gut barrier integrity.

Supports gut lining repair. Useful for leaky gut and post-antibiotic recovery.

This link is supported by 1 clinical study, with the evidence rated as moderate overall.

Best Prices in Australia

BulkSupplements L-Glutamine Powder

BulkSupplementsviaBulkSupplements

5g per serve · 200 serves · Powder

$0.12/serve

$24.90 total

Buy
2

NOW L-Glutamine 1000mg

NOW FoodsviaiHerb

1000mg per serve · 120 serves · Capsule

$0.16/serve

$19.50 total

Buy
3

L-Glutamine Powder 1kg

NOW FoodsviaiHerb

5 g per serve · 200 serves · powder

$0.17/serve

$34.99 total

Buy
4

L-Glutamine Powder 500g

BulkSupplementsviaBulkSupplements

5g per serve · 100 serves · powder

$0.25/serve

$24.99 total

Buy
5

Thorne L-Glutamine Powder

ThorneviaThorne

5g per serve · 90 serves · Powder

$0.58/serve

$52.00 total

Buy

Interactions to Watch

  • Lactulosemoderate— Glutamine may counteract the effects of lactulose, which is used to treat hepatic encephalopathy by reducing ammonia levels.
  • Seizure medicationsmoderate— Glutamine is a precursor to glutamate, an excitatory neurotransmitter.
Check all interactions

Other Supplements for Gut Health

Probiotics

strong evidence

Psyllium Husk

strong evidence

Berberine

preliminary evidence

View complete Gut Health supplement guide

Frequently Asked Questions

How much L-Glutamine should I take for gut health?
The recommended dose of L-Glutamine for gut health is 5-10 g per day. Supports gut lining repair. Useful for leaky gut and post-antibiotic recovery. Always consult a healthcare professional before starting supplementation.
When is the best time to take L-Glutamine for gut health?
Take on empty stomach. Consistency matters more than exact timing — take it at the same time each day for best results.
How long does L-Glutamine take to work for gut health?
Most people notice effects within 4-8 weeks. Individual results vary depending on baseline levels, dosage, and overall health. Consistent daily use is important — don't expect overnight results.
What form of L-Glutamine is best for gut health?
L-Glutamine is available as powder, capsule. Powder forms often offer the best value per serve and can be mixed into drinks.
Where can I buy L-Glutamine for gut health in Australia?
You can buy L-Glutamine from BulkSupplements, iHerb, Thorne in Australia. The best value we found is BulkSupplements L-Glutamine Powder at $0.12 per serve from BulkSupplements.
Is L-Glutamine safe? Are there any interactions?
L-Glutamine is generally considered safe at recommended doses. However, it can interact with Lactulose, Seizure medications. Always check with your doctor if you take medications, especially before combining supplements.

Get a Full Gut Health Stack

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This information is for educational purposes only and is not medical advice. Consult a healthcare professional before starting any supplement regimen. SuppUp earns affiliate commissions from qualifying purchases — this does not affect our recommendations.