Free tools for staying regular on a GLP-1.
Six calculators and reference tools, each built from published sources. No email required, nothing stored, nothing sent anywhere.
Start Here
If you're building a routine, these two work as a pair — the fiber schedule sets the water target.
Fiber Ramp Calculator
Adding fiber too quickly is the most common reason people decide it doesn't work. Three questions, and you get a week-by-week ramp paced to where you actually are.
Build my ramp →Daily Water Intake Calculator
Built on the National Academies' adequate intake figures and adjusted for your fiber doses — not the bodyweight rule that gets repeated everywhere without a source.
Calculate my target →Figure Out What's Going On
Reference tools for making sense of what you're seeing.
Bristol Stool Chart
All seven types, what each indicates about how fast things are moving, and what tends to shift it. The validated scale clinicians actually use, made tappable.
Find my type →GLP-1 Clearance Calculator
Enter your last injection date and see the week-by-week timeline for how much medication is still in your system. Semaglutide, tirzepatide, dulaglutide, liraglutide.
See my timeline →Magnesium Form Comparison
Absorption and laxative effect run in opposite directions. Compare bisglycinate, citrate and oxide — including the trial result that doesn't favour the one I sell.
Compare forms →Gut Check Quiz
Six questions to work out which lever is most likely the missing one for you — and to flag anything that should go to your provider instead.
Take the quiz →What these are, and what they aren't.
Every tool here is built from published sources listed on its own page, and every one runs entirely in your browser — nothing you type is stored, sent, or seen by me. They're free, they don't require an email, and they aren't gated.
What they aren't: a diagnosis, or any kind of instruction about your prescription. None of these will tell you what condition you have or what dose to take. If something you enter suggests a reason to talk to a provider, the tool says so rather than offering you a supplement. Read how I source everything on this site.
Sources cited on every tool, verified against PubMed and FDA labeling.
Nothing stored, nothing transmitted — the maths happens on your device.
Red-flag routing built in. Some answers should send you to a provider, not a product.
Staying regular on a GLP-1: my simple daily routine.
Get my free guide — the three levers that work, and the mistakes I see people make.