Sources and how we check our guides
Read the sources behind our hydration calculators and guides, see how we review them and find out how to suggest a correction.
How we write and check guides
We use guidance from public-health bodies, professional associations and standards organisations, alongside peer-reviewed research. You’ll find sources in each long guide and an explanation next to each calculator result.
We may use software to organise drafts. We check health claims against the sources on the page and update the date when we make substantial changes.
Benjamin Dickman runs HydrateWise and handles corrections. When a qualified clinician reviews a page, we’ll name them on it. Some guides use generated illustrations to show examples. Hands-on product testing is described separately wherever it takes place.
How we handle paid links
We label paid links and include product suggestions where they help with the decision on the page. Those links have no bearing on calculator figures, health guidance or editorial conclusions.
Sources we use often
NHS: Water, drinks and hydration
Daily fluids, which drinks count and when you might need more.
EFSA dietary reference values for water
The European reference figures for water intake and the research behind them.
National Athletic Trainers’ Association: Fluid replacement
How to measure sweat rate and manage the risks of drinking too little or too much during exercise.
Exercise-associated hyponatraemia consensus update
The risks and symptoms of low blood sodium during exercise, including how overdrinking can contribute.
IOC consensus on exercise in the heat
How athletes and event organisers can prepare for hot conditions.
CDC/NIOSH: Workplace heat recommendations
Rest breaks, drinking water and other ways to reduce heat risk at work.
Recent updates
- 14 November 2026 – connected the daily drink log, added saved routines and updated the race and refill planners. Reviewed search titles and wording across the site.
- 25 September 2026 – added fuel and label tools, printable worksheets, six carrying and fuelling guides and topic collections. Worked examples identify made-up figures and dated manufacturer labels.
- 5 September 2026 – checked live pages, calculator results and search visibility. Added sweat-session comparisons, revised schedule limits and reviewed affiliate listings and redirects.
- 4 September 2026 – added guides for more activities, explained the calculation methods and updated guidance on overdrinking and optional weather lookups.
- 21 August 2026 – published our policies for sources, corrections and paid links.
Suggest a correction
Use the contact link on the About page. Please send the page address, the wording you’re flagging and a reliable source.
Editorial approach last updated 14 November 2026.