Sources and References
Updated April 2026
This site cites primary clinical sources for all medical claims. Below is an annotated bibliography of the main references used across the site, with a note on what each source is used for. This transparency is part of our commitment to E-E-A-T (Experience, Expertise, Authoritativeness, Trustworthiness) standards for YMYL health content.
Clinical Reference (US)
Primary source for urine colour definitions, healthy range, and general urine health guidance. Cited throughout site.
Comprehensive medical reference for per-colour causes, medication effects, and clinical guidance. Primary source.
US National Institutes of Health reference for urine colour changes and clinical significance.
Kidney disease pages, diabetes insipidus reference, and kidney testing guidance.
Primary source for drug side effect profiles, including medication-related urine colour changes.
Clinical Reference (UK)
NHS clinical guidance on haematuria, including the two-week urgent referral rule for over-45s with unexplained visible blood. Cited on /blood-in-urine and /red pages.
NHS guidance on jaundice presentation and management. Cited on /liver-signs.
NICE guidelines for urgent cancer referrals including the over-45 painless haematuria two-week-wait rule. Cited on /red and /blood-in-urine pages.
NICE guidelines on urinary tract infection management in adults and pregnancy. Cited on /uti-signs.
Paediatric UTI management guidelines. Cited on /children.
Specialist Organisations
Foamy urine as an early kidney warning sign. eGFR and UACR reference values. Cited on /foamy and /kidney-signs.
AUA guidelines on the evaluation of haematuria. Cited on /blood-in-urine.
Exercise and fluid replacement position stand. Activity-based hydration multipliers. Cited on /hydration-calculator.
Peer-Reviewed Research
Foundational study validating urine colour scale against laboratory specific gravity measurements. Basis for /hydration-chart page.
RCT showing 50% reduction in UTI recurrence with increased water intake. Cited on /uti-signs.
European Food Safety Authority reference values for adequate water intake. Basis for /hydration-calculator methodology.
Medical News and Consumer Health
Referenced as competitor and general consumer health reference.
Referenced as competitor and general consumer health reference.
Medical Review Note
This site is maintained by Digital Signet, a content publisher. The medical information on this site is compiled from the primary sources listed above and is intended for general information purposes only. It has not been reviewed by a named individual clinician. We aim to cite primary sources for all claims and to apply conservative, clinically appropriate thresholds for "when to see a doctor" guidance.
If you notice errors or outdated information on any page, please contact us. Medical guidelines change and we aim to keep pages current.