CortexLit tool · nutrition basics

Drink Log and Pattern Checker

See the shape of a day's intake, including food and other drinks, rather than tracking plain water alone.

Runs offline in your browserNo account Nothing is uploaded

← Back to the article · See the evidence

What this is based on

Every output names at least one verified PubMed source.

Valtin H. "Drink at least eight glasses of water a day." Really? Is there scientific evidence for "8 x 8"? Am J Physiol Regul Integr Comp Physiol. 2002;283(5):R993-R1004.
PMID 12376390
Critical review of the evidence base for the 8x8 rule. · weight 0.5 · No scientific studies were found supporting a rigid eight-glasses rule for healthy, sedentary adults in temperate climates; food and other drinks count, and thirst is a usable guide.
Parkinson E, Hooper L, Fynn J, et al. Low-intake dehydration prevalence in non-hospitalised older adults: Systematic review and meta-analysis. Clin Nutr. 2023;42(8):1510-1520.
PMID 37330324
Systematic review and meta-analysis of low-intake dehydration prevalence. · weight 1.0 · Low-intake dehydration is common in community-dwelling older adults, a group in whom the thirst signal is blunted.

Limits: Per-item volumes are rough defaults, not measurements. Urine colour is influenced by B vitamins, beetroot and some medicines, so it is a prompt rather than a clinical sign.

Privacy

Inputs stay in this page's memory. There is no telemetry, no analytics call and no network request. The optional share card below is off until you switch it on, is built on your own device, and never includes anything you did not choose to include.

Free vs Plus

Free (this page)

  • Unlimited logs
  • Copy or download a day summary
  • Offline, nothing stored

Plus (optional, one-time)

  • Seven-day pattern view
  • Export a week as text for a clinician visit

Payment link: PLACEHOLDER_STRIPE_PAYMENT_LINK — not live yet. No account, no subscription, no data leaves this page.

Related

Read the full article · Cautions · All CortexLit articles