Question 1

Why not just take free glutamine?

Accepted Answer

Free glutamine is unstable in solution — it degrades to pyroglutamic acid within hours. Ala-Gln is stable for months in liquid form and has higher bioavailability in studies. It is the preferred form in clinical nutrition for this reason.

Question 2

Does Ala-Gln help with leaky gut?

Accepted Answer

Clinical studies show Ala-Gln reduces intestinal permeability (measured by lactulose/mannitol ratio) in exercise-induced gut stress and in critically ill patients. It upregulates tight-junction proteins. 'Leaky gut' is a colloquial term; the measurable effect is reduced paracellular permeability.

Question 3

Is this the same as sports glutamine supplements?

Accepted Answer

Some sports supplements use Ala-Gln (branded as Sustamine); most use free L-glutamine powder. The dipeptide form has superior stability and some evidence for better absorption, but costs more.

Question 4

How does Ala-Gln compare to BPC-157 for gut health?

Accepted Answer

They target different aspects of gut integrity. Ala-Gln provides glutamine as fuel for enterocyte proliferation and tight-junction protein synthesis — it's nutritional support. BPC-157 acts through signaling pathways (VEGFR2, NO/NOS) to accelerate tissue repair. Ala-Gln has stronger clinical evidence (ICU nutrition trials, exercise studies) but addresses maintenance rather than injury repair. They're complementary, not competing approaches.

Question 5

What dose of Ala-Gln is supported by evidence?

Accepted Answer

For gut permeability reduction during exercise, studies have used 0.2 g/kg body weight (14 g for a 70 kg person) taken 30–60 minutes before exercise. For general gut support, 2–10 g daily is the range used in clinical studies. In ICU parenteral nutrition, doses of 0.3–0.5 g/kg/day have reduced infection rates and hospital stays in meta-analyses.

Question 6

Does Ala-Gln help with exercise-induced gut problems?

Accepted Answer

Yes — this is one of its strongest applications. Intense exercise, especially in heat, increases intestinal permeability. Multiple studies show Ala-Gln supplementation reduces post-exercise gut permeability measured by lactulose:mannitol ratio, decreases circulating endotoxin levels, and may reduce GI symptoms in endurance athletes. The effect appears dose-dependent.

Question 7

Is Ala-Gln safe for long-term use?

Accepted Answer

Ala-Gln has been used in clinical nutrition for decades with an excellent safety profile. One caveat: high-dose glutamine supplementation in critically ill patients with multi-organ failure has shown potential harm in some trials (REDOXS trial). For generally healthy individuals using oral doses for gut or exercise support, long-term safety concerns are minimal.

Origin / Manufacturer	Synthetic
Active Components	L-Alanyl-L-Glutamine
Storage	Room temperature; stable in solution (key advantage)
Shelf Life	24+ months
Form Factor	Powder or solution (200 mg/mL concentrate for IV)

Alanyl-Glutamine (Ala-Gln)

Specifications

Frequently Asked Questions

Sources & References

Related Peptides

BPC-157

Hydrolyzed Collagen Peptides