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.

Vitamin A: Clinical Evidence & Substantiation Summary

Clinical Trials

Strongest Evidence

Immune & Vision Support

Typical Dosage

700–3,000 mcg RAE/day

Common Forms

Retinyl palmitate

What Is Vitamin A?

Vitamin A is a fat-soluble vitamin essential for vision, immune function, cell differentiation, and reproductive health. It exists as preformed retinol (from animal sources) and provitamin A carotenoids (from plant sources, primarily beta-carotene).

Mechanism of action: Retinol is converted to retinoic acid, which binds to nuclear receptors (RARs and RXRs) governing gene expression for cell differentiation, immune cell maturation, and epithelial tissue integrity. In the retina, 11-cis-retinal combines with opsin to form rhodopsin, the visual pigment essential for dim-light vision.

Clinical Evidence Summary

Below are 5 key clinical studies on Vitamin A. Nutra Comp analyses 98+ studies in its full clinical evidence report.

Meta-analysis2020PMID: 32214289

Vitamin A supplementation and immune function: meta-analysis

Population: 16 RCTs

Key finding: Vitamin A supplementation reduced infection incidence by 20% (RR 0.80, p=0.001) in deficient populations, particularly children.

Systematic review2019PMID: 30547890

Vitamin A and skin health: systematic review

Population: 11 studies

Key finding: Retinol supplementation improved skin texture, reduced fine lines, and enhanced skin barrier function via increased keratinocyte differentiation.

Meta-analysis2018PMID: 29307925

Beta-carotene supplementation and antioxidant status

Population: 9 RCTs

Key finding: Beta-carotene supplementation significantly increased plasma antioxidant capacity and reduced markers of oxidative stress.

Cochrane systematic review2019PMID: 31305906

Vitamin A and maternal health: Cochrane review

Population: 19 RCTs

Key finding: Vitamin A supplementation in deficient populations reduced maternal night blindness and improved infant birth weight outcomes.

Review2017PMID: 28829155

Vitamin A and epithelial barrier integrity

Population: Clinical and preclinical studies

Key finding: Vitamin A is essential for maintaining mucosal barrier function in the respiratory and gastrointestinal tracts.

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 vision, especially in low-light conditions”

Category: Vision · Confidence: 9/10

“Supports healthy immune system function”

Category: Immune · Confidence: 9/10

“Supports healthy skin and cell differentiation”

Category: Skin · Confidence: 8/10

Get the full substantiation report for Vitamin A

Includes all 98+ clinical studies analysed, complete claims library, and a ready-to-file substantiation memo.

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Related Ingredients

Vitamin D3

127 studies · Bone Health & Calcium Metabolism

Zinc

92 studies · Immune Function

Vitamin C

168 studies · Immune Function

Key Terms

Daily Value (DV)Supplement Facts Panel Dose-Response Relationship

Frequently Asked Questions

Is vitamin A FDA approved?

Vitamin A is an essential nutrient. The Daily Value is 900 mcg RAE. It does not require FDA drug approval. Preformed vitamin A has a defined tolerable upper limit of 3,000 mcg/day due to toxicity risk.

What is the difference between retinol and beta-carotene?

Retinol (preformed vitamin A) is directly bioactive. Beta-carotene is a provitamin A that must be converted. Beta-carotene has no toxicity risk as conversion is regulated. Retinol can be toxic at high doses.

What dosage is used?

The DV is 900 mcg RAE. Beta-carotene: 6–15 mg/day (equivalent to 1,000–2,500 mcg RAE). Do not exceed 3,000 mcg/day preformed retinol in supplements.

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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