Tools
Free things we built because the answer was easier to show than to write. Each one runs on published numbers, and each one tells you where those numbers came from.
Poop Word Game
Change a four-letter word into POOP one letter at a time, in as few steps as you can. One ladder a day, the same for everyone, and a spoiler-free grid to share when you land it.
Open CalculatorThe Fiber Calculator
Your daily target from the federal reference intakes, then build a real day from USDA numbers and watch the gap close. Most people are further off than they think — and closer to fixing it than they expect.
Open CheckerThe Poop Frequency Checker
Pick your Bristol type and how often you go. See where that sits against what large population studies actually found — no verdicts, just the published range and where you land in it.
Open QuizThe Poop Quiz
Eight questions, four gut types, one shareable result. The one readers keep sending to their group chat.
Open GuideThe Best Gut Health Podcasts
Our ranked guide to the shows worth your commute — every show checked to be still publishing, every host looked up, and the episode to start on.
Open DatasetThe Prebiotic & Fiber Label Index
We ran the fiber lines of 54,753 branded US products through one spreadsheet. Which fibers brands actually use, how many reach 5 grams, and why "acacia" on a label usually means a glaze, not a prebiotic. Free CSV.
Open DatasetThe Gut Health Recall Tracker
Every FDA and USDA food recall since 2019 involving a gut pathogen, in one place: 1,033 of them, broken down by bug and by year. Updated quarterly, free to download.
Open TrackerThe Norovirus Tracker
Is a stomach bug going around? This week’s norovirus reading from US wastewater, CDC outbreak counts, the strain in circulation, cruise ships and recalls, set beside past seasons. Updated every Monday.
OpenWhy we build these
A lot of gut-health questions are really arithmetic wearing a costume. How much fiber is enough, how far off you are, whether your week is unusual — those have answers, and the answers are more useful when you can put your own numbers in rather than read someone else’s example.
So every tool here is built on figures we can point at: the federal reference intakes, the USDA’s food composition database, the studies that established the reference ranges. The sources are listed on each page, under the tool, where you can check them. Nothing here diagnoses anything, and nothing here is a substitute for a clinician who knows your history.
Educational tools, not medical devices or medical advice. If something about your digestion is bothering you or has changed, that is a conversation for a clinician.