Evidence and editorial policy
Fruitful Years helps readers understand health research and prepare better questions. Educational explanations do not establish a diagnosis, select treatment or replace an individual clinical assessment.
How we use AI
AI assistance is used to help draft and restructure explanations, identify candidate sources, summarize material and develop website components. AI can omit context, misstate results or generate references that do not exist. Its output is not a source of evidence or medical authority.
Ken Gardner is responsible for the site’s editorial decisions. An author credit alone does not mean a clinician has reviewed the article. We distinguish AI-assisted drafting from human source verification and identify completed factual reviews separately from layout or wording updates.
Our publication standard is to check the original source, study design, population, outcomes and limitations before using a scientific claim. A proposed review process is not proof that every older article has completed it. Where verification is incomplete, a claim should be qualified, removed or marked for review.
Medical judgment begins with an appropriately qualified clinician considering an individual person’s symptoms, history, medicines, examination and preferences. Fruitful Years and its AI-assisted tools do not perform that assessment.
How we assess study quality
Design is a starting point, not a quality score. A meta-analysis can combine weak studies; a well-conducted cohort can answer important long-term questions but usually cannot establish causation on its own. We use the following editorial framework, not a claim of formal GRADE assessment.
| Source or design | Useful for | Checks and limits | Editorial treatment |
|---|---|---|---|
| Evidence-based guideline or systematic review / meta-analysis | Understanding the overall evidence and clinical recommendations. | Search methods, included designs, bias, inconsistency, absolute effects, certainty and relevance. | Prioritize rigorous, current syntheses; never label strong solely because results are pooled. |
| Randomized human trial | Estimating intervention effects in the studied population. | Randomization, attrition, sample size, duration, harms and clinical outcomes versus surrogate markers. | Describe the tested intervention and who was studied; do not generalize beyond them without qualification. |
| Prospective human cohort | Long-term associations and uncommon outcomes. | Confounding, measurement error, selection and reverse causation. | Use association language; useful human evidence is not proof of treatment benefit. |
| Cross-sectional or case-control study | Identifying patterns and generating hypotheses. | Timing, recall, selection and confounding. | Explain uncertainty and avoid causal conclusions. |
| Animal or cell experiment | Exploring mechanisms. | Species, dose, laboratory conditions and translation to humans. | Label preclinical; do not turn into human treatment or supplement advice. |
| Personal experience or expert opinion | Providing context and generating questions. | No controlled comparison; individual experience may not generalize. | Label clearly; never substitute for evidence of benefit or safety. |
For each important claim, we aim to record the source, population, design, outcome, effect size where useful, and main limitations. Uncertainty, null results and conflicts of interest matter alongside positive findings. See the GRADE Working Group’s approach to certainty of evidence.
Submit a citation challenge or correction
Use Reader Feedback and choose Editorial Correction. Researchers, clinicians and readers are welcome to challenge a claim. Please include:
Page URL: [link]
Claim being challenged: [quote the exact sentence]
Concern: [incorrect citation, outdated evidence, overstated conclusion or other issue]
Source: [DOI, PubMed link or original publication]
Suggested correction: [brief wording, including uncertainty]
Relevant conflicts of interest: [if applicable]
Our target is to acknowledge citation and factual correction reports within five business days. Full assessment may take longer. Acknowledgement does not imply agreement; substantive corrections should include a dated note explaining what changed.
Please do not include personal medical history, lab panels or urgent health questions. This is an editorial contact route, not a clinical service.
Older guides and revision transparency
This standard was published on September 13, 2026. Adding a source section, navigation or schema to an older guide does not mean every underlying claim has received a new evidence review. Existing source lists are retained. Sources without a completed study-level appraisal are not presented as appraised trials or clinical recommendations. Substantive evidence revisions should state what changed and when; layout changes are not clinical review dates.
Experience, tools and commercial interests
Personal observations can illustrate a routine but are not research evidence. Calculators and worksheets on this site are educational organizers, not validated diagnostic tools. Any material commercial relationship should be disclosed alongside the relevant recommendation; affiliate relationships do not make a source stronger.
Ken Gardner is a non-clinical writer, not a physician or clinician. Fruitful Years does not have an external clinical review board. See the authorship disclosure and medical disclaimer.