HumanFuelGuide
The definitive, evidence-based authority for fitness nutrition and training strategy.
Explore Articles →Core Pillars
How We Work
Our Methodology
Every article on HumanFuelGuide follows a strict editorial process designed to produce the most accurate, evidence-based answers — not the most clickable ones.
01
Evidence-Based Sourcing
Every claim is cited or grounded in peer-reviewed research. We link to primary studies, not summaries.
02
Independent Testing
Tools and supplements are evaluated in-house over 30–90 day testing windows with documented protocols.
03
Editorial Independence
No paid placements, no affiliate-driven rankings. Recommendations follow the data, not partnerships.
04
Continuous Updates
Articles are dated and revised when new evidence emerges. Major changes are logged transparently.
Trust & Transparency
Frequently Asked Questions
How is HumanFuelGuide funded? Do brands pay for rankings?
No. Rankings are determined solely by independent testing data. We don't accept sponsored placements or paid supplement-industry partnerships. Where we use affiliate links, they're clearly disclosed and never influence which products earn a Top Pick — we frequently recommend products we earn nothing from when the evidence supports it.
What does 'evidence-based' actually mean here?
We prioritize peer-reviewed research from journals indexed on PubMed and the Cochrane Library, weighing systematic reviews and randomized controlled trials more heavily than observational data. When evidence is preliminary or contested, we say so explicitly rather than overstating confidence in a recommendation.
How carefully do you test the products you review?
Tools and supplements undergo 30–90 day in-house testing windows with documented protocols. For calorie trackers, we spot-check food databases against USDA FoodData Central. For supplements, we verify third-party batch certifications (Informed Sport, NSF Certified for Sport) before recommending.
What happens when new evidence contradicts an existing article?
Every article carries both a published and last-updated date. When new evidence changes a recommendation, we revise the article and log the change at the bottom. Major reversals — upgrading or downgrading a product — are flagged in the article's changelog so readers can see how our position evolved.