What is supplement substantiation?

Substantiation is the process of gathering and documenting scientific evidence that supports the health claims you make on your supplement labels and marketing materials. The FDA requires that all structure–function claims be truthful, non-misleading, and substantiated by competent and reliable scientific evidence — typically clinical trials on healthy human subjects.

How does Nutra Comp's AI analysis work?

Nutra Comp searches PubMed for clinical trials relevant to your ingredient, filters for studies on healthy human subjects with oral administration, and uses AI to extract key data: p-values, effect sizes, study design, population details, and conclusions. It distinguishes between across-group and within-group significance and ranks evidence strength with a confidence scoring system.

What data sources does Nutra Comp use?

Nutra Comp primarily searches PubMed/MEDLINE, the world's largest biomedical literature database maintained by the U.S. National Library of Medicine. We focus on peer-reviewed clinical trials, randomised controlled trials (RCTs), meta-analyses, and systematic reviews.

Are the generated claims FDA-compliant?

Yes. Nutra Comp generates structure–function claims in strict accordance with the FDA Small Entity Compliance Guide. All claims avoid explicit and implicit disease references. However, we recommend having your legal/regulatory team review the final output before use, as Nutra Comp is a tool to assist — not replace — professional compliance review.

How long does a typical ingredient search take?

Most ingredient searches complete within 5–15 minutes, depending on the volume of clinical literature available. Compare this to the typical manual process which can take 40–100+ hours per ingredient when done by a human compliance expert.

Can I export my reports?

Absolutely. All clinical evidence reports, structure–function claims, and substantiation memos can be exported as professional PDF documents. These are formatted for easy sharing with your legal team, regulatory reviewers, or business partners.

What does 'ingredient searches per month' mean?

Each search is one ingredient analysis — for example, searching 'Ashwagandha' or 'Vitamin D3'. The search generates a complete evidence report, claims, and substantiation memo for that ingredient. Your monthly allowance resets on your billing date.

When will Nutra Comp be available?

We're currently in private beta. Join the waitlist to get early access and be notified when we launch. Early waitlist members will receive priority access and special launch pricing.

L-Glutamine: Clinical Evidence & Substantiation Summary

Clinical Trials

Strongest Evidence

Gut & Immune Health

Typical Dosage

5–20 g/day

Common Forms

L-glutamine powder

What Is L-Glutamine?

L-glutamine is the most abundant free amino acid in the human body. It is a 'conditionally essential' nutrient, meaning demand increases dramatically during periods of metabolic stress. It is a primary fuel for the cells of the gut and immune system.

Mechanism of action: Glutamine is the preferred fuel source for enterocytes (gut cells) and lymphocytes. It supports intestinal barrier integrity by upregulating tight junction proteins (ZO-1, occludin). It is also a precursor for glutathione and acid-base regulation in the kidney.

Clinical Evidence Summary

Below are 3 key clinical studies on L-Glutamine. Nutra Comp analyses 92+ studies in its full clinical evidence report.

RCT, double-blind2018PMID: 29849031

L-glutamine and intestinal permeability in IBS

Population: 106 adults with post-infectious IBS

Key finding: 5 g glutamine (TID) significantly reduced intestinal permeability and improved IBS symptom severity scores by 50% vs placebo (p<0.001).

Cochrane meta-analysis2019PMID: 30547890

Glutamine supplementation and critical illness: meta-analysis

Population: 53 RCTs

Key finding: In metabolically stressed (critically ill) populations, glutamine significantly reduced infection rates and length of hospital stay (p=0.04).

Systematic review2019PMID: 31142457

L-glutamine and exercise recovery: systematic review

Population: 25 studies

Key finding: Glutamine supplementation effectively reduced markers of exercise-induced muscle damage and supported immune function during intensive training blocks.

Evidence-Based Structure–Function Claims

Sample FDA-compliant structure–function claims generated by Nutra Comp, each linked to clinical evidence and scored for confidence.

“Supports healthy intestinal barrier integrity and gut lining”

Category: Digestive Health · Confidence: 9/10

“Supports healthy immune system function”

Category: Immune · Confidence: 9/10

“Supports muscle recovery and nitrogen balance”

Category: Performance · Confidence: 7/10

Get the full substantiation report for L-Glutamine

Includes all 92+ clinical studies analysed, complete claims library, and a ready-to-file substantiation memo.

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Related Ingredients

Probiotics

156 studies · Digestive Health

Zinc

92 studies · Immune Function

Bovine Colostrum

25 studies · Immune & Gut Health

Key Terms

Substantiation Randomised Controlled Trial (RCT)Clinically Effective Dose

Frequently Asked Questions

Is L-glutamine FDA approved?

L-glutamine is sold as a supplement and has GRAS status. It is also an FDA-approved drug (Endari) at high doses for the treatment of sickle cell disease.

Does it help with 'leaky gut'?

Clinical evidence for post-infectious IBS and athletes shows that glutamine can significantly improve intestinal permeability ('leaky gut') by supporting the cells of the intestinal lining.

What is the best way to take it?

Glutamine is best taken on an empty stomach or with a light snack. For gut health, 5 grams 1-3 times daily is a common clinical protocol.

Stop Spending Weeks on Substantiation

Nutra Comp generates full clinical evidence reports, FDA-compliant structure–function claims, and substantiation memos in minutes — not months.

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