The toolbox
Gut & Metabolic Tools
Small, honest, source-backed tools that turn the research we cover into something you can use in a minute. No sign-up, nothing stored, and every figure or pick traces back to a cited source or a worked calculation you can check yourself.
True Cost-Per-Month Calculator
Normalize 4-week cycles, prepay blocks, first-month promo rates, and per-vial pricing into one honest monthly figure. A 4-week cycle bills 13 times a year, not 12.
$187.25/mo, year one
Steady-state (no promo): $193.92/mo — not $179.
Probiotic Strain Finder
Pick a goal — blood sugar, weight, bloating, constipation, post-antibiotic, or general gut health — and see the specific strains with the best human evidence, each with an honest grade.
6goals · 19 graded picks
Starts on “Blood sugar / metabolic” with 4 strains shown.
Strain-to-Evidence Lookup
Have a strain name from a label or an ad? Search it directly and see exactly what the human evidence supports, goal by goal, with an honest grade.
16strains, searchable
5 graded Moderate or better — most land Modest or Thin, and say so.
Daily Fiber Target Calculator
Turn published guidance into one number: your daily fiber target (14 g per 1,000 kcal, or the IOM Adequate Intake by age and sex) and the grams you’d add to close the gap.
28g/day
At 15 g/day today, that's a +13 g gap to close.
Fermentable Fiber → SCFA Estimator
Enter grams of specific fermentable fibers and get a relative SCFA / satiety tier, with an honest read on the fiber→SCFA→GLP-1/PYY pathway.
Moderatescore 13.3
Psyllium alone at the same 10 g scores Low — it gels, it doesn't ferment.
Every tool here is educational and is not medical or nutrition advice. They apply population-level evidence (or, for the cost calculator, arithmetic on the terms you enter) and cannot account for your individual health, medications, conditions, or the exact terms a specific provider currently offers. For anything that matters, talk to a licensed clinician or registered dietitian, and confirm pricing directly with a provider.
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