Editorial policy

Vitualha exists to translate nutrition and health science into plain language, separating solid evidence from hype, myth and premature conclusions.

This page describes how we do that. It was written to be checked: every line here describes a process we actually follow, not a badge we would like to wear. Trust in health content is built on transparency about method — not on decorative credentials.

Our editorial mission

Vitualha’s content is informational and educational. Our job is to read what the available research shows about food, nutrients and health, and hand that back to the reader with the degree of certainty the evidence genuinely supports — no more, no less.

That means accepting uncomfortable answers. When the data is weak, the text says it is weak. When the answer depends on who, how much and how often, the text explains what it depends on. It is less appealing than a closed headline, and it is the only way for a reader to leave better informed than they arrived.

Vitualha is an independent publication. It is not a clinic, a practice, a university, a medical institution or a scientific body, and it does not provide individual care.

How we produce our content

Topics come from real questions

We write about what people actually ask — in searches, in reader messages, in ordinary conversation about food. Interest in a topic helps us choose it; it never decides the conclusion.

Research comes before writing

Before writing, we look for the best available published work on the subject, favouring the sources described in the next section. When we find a legitimate controversy among researchers, it goes into the text instead of being resolved out of convenience.

Every quantitative claim needs a source

Dose, percentage, amount per serving, recommended range, time to effect: none of it enters an article without an identifiable source, listed at the end of the text. A number without a source is an opinion dressed up as data.

The text opens with the answer

The first paragraph gives readers what they came for, with the necessary caveats. The explanation follows. Anyone who reads only the opening still leaves with the correct information, rather than three paragraphs of suspense.

And closes with what to do

Information that never reaches practice has done half the job. Whenever possible, we end with what it means in a real routine.

How we select scientific evidence

We prioritise, in this order:

1. Systematic reviews and meta-analyses — the body of research on a question, not a single study
2. Randomised controlled trials — the design that allows us to speak of cause and effect
3. Guidelines, consensus statements and position papers from scientific societies
4. Health authorities and regulatory agencies — WHO, NIH, FDA, EFSA and their national equivalents
5. Universities and recognised scientific institutions
6. Large observational studies, when the question does not allow a trial
7. Official food composition databases, for nutritional values

Primary literature is searched in databases such as PubMed, and we always prefer the original source to the news story summarising it.

What we do not treat as definitive proof

Some study types are excellent starting points and terrible finishing lines. We do not present the following as firm conclusions when they are not enough to support one:

• an isolated study, however recent or widely covered
• an observational study, which shows association and not cause
• animal research
• laboratory or cell studies
• studies with small samples, short duration or surrogate outcomes
• subgroup analyses found after the primary result failed to appear

And we do not build on: personal testimony, influencer opinion, material produced by supplement manufacturers, or animal studies presented as if they were conclusions for humans.

The hierarchy of evidence

Not every study proves the same thing. That difference is what separates a headline from useful information — and it is what we try to keep visible in the text:

The hierarchy guides but does not decide on its own: a meta-analysis of poor studies is still poor evidence, and a well-conducted trial can be worth more than a rushed review. Methodological quality, effect size, risk of bias and consistency across studies all count. When an article’s conclusion rests on weaker evidence, we try to say so in the text itself, not in a footnote.

How we handle uncertainty and controversy

A few principles apply to everything we publish:

• Science is a process, not a verdict. New evidence changes conclusions — including ours.
• Association is not causation. People who eat more of a given food usually differ in many other ways, and it is not always possible to separate one effect from another.
• Statistical significance is not clinical relevance. A real but tiny difference is still tiny.
• Absence of evidence is not evidence of absence. “Not yet demonstrated” is not the same as “demonstrated not to work”.
• An average result is not an individual result. The mean of a group describes the group, not necessarily you.

What we keep apart

Much of the confusion around nutrition comes from treating five different things as one. We try to keep the distinction explicit between:

• well-established facts — supported by consistent, converging evidence
• promising evidence — favourable results that still need confirmation
• uncertain results — conflicting or insufficient research
• hypotheses — plausible mechanisms not yet tested in people
• claims without good scientific support — what circulates but does not hold up

Language and headlines

We do not use the vocabulary of promises. When the evidence does not support them, phrases such as “miracle food”, “cure”, “miracle detox”, “melts fat”, “boosts immunity instantly”, “guarantees weight loss” and “prevents cancer” stay out of the text — along with gratuitous superlatives, demonised macronutrients and lists of “forbidden” foods.

Headlines can, and should, start from the question people actually ask: is it bad for you? is it fattening? does it work? is it healthy? What is not acceptable is answering with a yes or a no the research does not authorise. The honest answer almost always carries context: for whom, in what amount, how often and within what diet. That context is what the article delivers.

Responsible use of artificial intelligence

Vitualha uses artificial intelligence tools to support stages of the editorial process:

• initial research and locating sources
• organising and synthesising information
• structuring the text
• translation between Portuguese and English
• reviewing language, clarity and consistency
• comparative analysis across studies

Using these tools does not replace verification. Language models make mistakes, conflate findings and occasionally invent flawless-looking references — which is why no source enters an article without being opened and checked, and no figure is published without matching the original document.

Editorial responsibility for everything published rests with Vitualha, whatever tools were used along the way. AI is never used to manufacture authorship, credentials, citations or review. Cover images and illustrations are decorative: none of them represents data, a measurement or a study result.

Authorship

When an article is signed by a person, their name and role appear in the text itself and in the page’s structured data. When there is no individual byline, the publication answers for the content — and verification rests on the listed sources, which is precisely what a reader can check independently.

We do not invent authors, academic backgrounds, experience, titles or professional registrations. A name appears in an article only if that person exists and worked on that content.

Technical review

Certain content — clinical topics, supplementation, quantitative recommendations, higher-risk audiences — may be reviewed by a qualified professional before publication. When that happens, the reviewer is named in the article, with a verifiable credential.

Technical review is only declared when it actually took place. The absence of a reviewer on an article means exactly that: this text has not been through external technical review. We prefer a visible gap to a convenient claim.

Sources and references

Whenever possible, each article ends with the main sources used, linking directly to the original document. When the full study sits behind a paywall, we point to the abstract or the official record, so the reader can at least locate the work.

The rule is to prefer the primary source over coverage of it, and the current version of a guideline over the most widely shared one.

Updating articles

A nutrition article is never finished. We revise published texts when:

• relevant new studies change the picture
• official recommendations or guidelines are modified
• an error is identified, by us or by a reader
• new evidence significantly changes how a topic should be read

When a revision is substantive, the update date appears at the top of the article — and it tells you more than the publication date about whether the piece still stands.

Corrections

A relevant factual error is corrected as soon as it is confirmed. When the correction changes the meaning of a figure or a recommendation, it is recorded in the article, so that anyone who read the earlier version understands what changed. Minor fixes — typos, formatting, clarity — are made without a note.

We do not quietly remove incorrect content: correcting it and saying that we did is part of the method.

Editorial independence

No scientific conclusion is altered to favour an advertiser, brand, manufacturer, product, supplement or commercial partner. If an article runs against an advertiser’s interest, it gets published anyway.

Commercial relationships may fund the site. They do not decide topics, text or conclusions.

Advertising, affiliates and sponsorship

The site is funded by advertising, and we say so plainly:

• Ads are served by Google AdSense, which decides what to show. We do not negotiate placements with supplement, diet or health-product brands, and we have no individual control over which advertiser appears.
• Ads never disguise themselves as articles. Every block is labelled “Advertisement” and is visually separated from the text.
• An ad is not an endorsement. Nothing appearing in an ad block has passed our editorial standard or technical review, and a product shown beside an article does not carry Vitualha’s approval.
• We currently publish no affiliate links and no sponsored content. If that changes, the disclosure will come before the text, naming the sponsor, and the content will meet the same sourcing standard as everything else — including when the conclusion is unfavourable to the sponsor.

Details on advertising cookies and how to turn off personalisation are in the privacy policy.

Content about supplements

Supplements are where the gap between what a study shows and what a label promises tends to be widest. Our texts on the subject aim to make clear that:

• benefit depends on context — someone whose intake is already adequate rarely gains anything by adding more
• dose matters, as do the chemical form, timing and duration tested in the study
• study results do not automatically transfer to everyone — what was observed in young athletes does not necessarily describe an older adult, a pregnant person or someone with a chronic condition
• supplements do not replace adequate nutrition or medical treatment
• contraindications and drug interactions are mentioned whenever they are relevant to the topic

When the evidence for a supplement is good, we say it is good. When it is weak, we say it is weak — even if the product is selling well.

Limits of health content

Vitualha’s content is educational. It does not replace diagnosis, consultation, nutritional follow-up, treatment or individual prescription, and it should not be used to make decisions about a health condition on your own.

Nutritional needs are not a universal number. They vary with age, sex, body composition, physical activity, health conditions, medication use, pregnancy and breastfeeding, dietary restrictions and personal goals. An article describes the general picture; only an individual assessment describes you.

If you have a health condition, take medication regularly, are pregnant or breastfeeding, talk to whoever follows your case before making a significant change to your diet or starting a supplement.

Content in Portuguese and English

We publish in Portuguese and English. The translated version aims to preserve the original’s scientific meaning: the same data, the same caveats, the same sources.

What changes is the surface — examples, reference units, expressions and sentence structure are adapted to read naturally in each language, and the guidelines cited may include the body most relevant to each audience. When one version is corrected or updated, the other follows.

While a translation does not yet exist, the page in the other language shows the original text with a clear notice to the reader, rather than faking a version nobody wrote.

How to get in touch about corrections

Found an error of fact, interpretation or referencing? Write to contato@vitualha.com. It helps a great deal to include the article link, the passage in question and, if possible, the source supporting the correction.

We read every message and reply within five business days. Corrections sent by readers are credited publicly when the person who flagged it agrees.

The reverse holds too: if anything on this page does not match what you see in the articles, we want to know. An editorial policy that fails to describe the practice is worth nothing.