Immune4Life Guide · P030

Sources and Research Methodology

Immune4Life evaluates supplement and immune-health claims through a structured evidence framework.

The core question

Does the evidence directly support the exact claim being made about the exact product being discussed?

Evidence hierarchy

Preliminary evidence

• biochemical research;
• cell studies;
• molecular modeling;
• animal studies.

These support plausibility and hypothesis generation.

Limited human evidence

• small pilot studies;
• uncontrolled trials;
• retrospective studies;
• short studies;
• surrogate-marker studies.

Moderate evidence

• controlled human studies;
• relevant product and dose;
• appropriate comparator;
• meaningful outcome;
• acceptable risk of bias.

Strong evidence

• multiple high-quality trials;
• consistent results;
• direct product relevance;
• meaningful outcomes;
• acceptable safety data.

Highest confidence

• replicated findings;
• high-quality systematic reviews;
• consistent direct evidence;
• low risk of bias.

Product-match test

A study receives less direct weight when the product differs in:

• ingredient source;
• extract;
• formulation;
• dose;
• serving;
• route;
• population;
• duration;
• outcome.

Ingredient vs finished product

An ingredient study can support plausibility. It cannot automatically prove a multi-ingredient finished product.

Claims of synergy require evidence.

Laboratory markers vs clinical outcomes

Markers such as cytokines, NK-cell activity, gene expression, or antibody levels can be informative.

They do not automatically prove fewer illnesses, faster recovery, or improved quality of life.

Statistical vs clinical significance

A statistically significant result can be too small to matter practically.

We look for effect size, confidence intervals, baseline risk, adverse events, and meaningful outcomes.

Study-quality checklist

• preregistration;
• randomization;
• allocation concealment;
• blinding;
• comparator;
• sample size;
• dropout handling;
• prespecified outcomes;
• complete reporting;
• adverse events;
• funding;
• conflicts;
• replication.

Company-sponsored research

Company funding does not automatically invalidate a study.

We evaluate sponsor role in design, product supply, analysis, manuscript writing, publication rights, and author employment.

Peer review

Peer review is an important screen, not proof that a result is correct.

Journal quality, methods, transparency, and replication still matter.

Source priority

1. Current official U.S. labels.
2. FDA, FTC, NIH, CDC, NCCIH, and related public bodies.
3. Peer-reviewed primary research.
4. Systematic reviews and evidence reports.
5. Official certifier databases.
6. Current official company documents.
7. Secondary sources.
8. Consumer reports for experience only.

Claim wording

Evidence strength controls wording:

• preliminary;
• suggests;
• limited evidence;
• may support;
• associated with;
• demonstrated in the specific trial;
• not established;
• no reliable evidence.

Update and correction policy

Research pages should be updated when major new evidence, safety information, formula changes, or regulatory actions materially change the conclusion.

See the Editorial Policy for corrections and review standards.

Sources and current-reference pages

1. https://www.ftc.gov/business-guidance/resources/health-products-compliance-guidance
2. https://www.fda.gov/regulatory-information/search-fda-guidance-documents/guidance-industry-substantiation-dietary-supplement-claims-made-under-section-403r-6-federal-food
3. https://www.ncbi.nlm.nih.gov/books/NBK305518/
4. https://www.cochrane.org/about-us/evidence-based-health-care

Important disclosure

Immune4Life is an independent 4Life Affiliate education website and is not the 4Life corporate website. Some links may open an official personalized 4Life MyShop and may result in Affiliate credit or commission.

Product formulas, labels, prices, availability, compensation rules, customer programs, qualifications, and company policies can change. Current official U.S. 4Life documents and checkout control.

These statements have not been evaluated by the Food and Drug Administration. Dietary supplements are not intended to diagnose, treat, cure, or prevent any disease. This page is educational and is not individualized medical, legal, tax, or financial advice. Earnings are not guaranteed.

Editorial status: review pending. Last verified: Pending — this held draft is not approved for reliance.