HeyJaredDigestive Data
Where the gut-brain connection meets daily behavior. Research-driven guidance for people with chronic digestive conditions.
- Indexed issues, last 90 days
- 4
- Latest publication
- Sep 22, 2026
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- Earliest in this view
- Jul 19, 2026
Latest issues
GutStream Update #11: The Launch (opens the original)
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Months ago, I made a change to how this project, formerly known as the Functional Performance Index (FPI), worked. Instead of looking at what’s typically true across thousands of people, it became built around what’s true for you, day by day. Since then, the project has stopped being a research index and become a product.It’s now called GutStream.As someone who has spent years monitoring my own behavior and corresponding symptoms, one of the most frustrating aspects of managing gut health is try
GutStream Update #10: How GutStream Actually Works (opens the original)
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Update #9, posted nearly two months ago, ended with a reversal.NHANES, the dataset this project was originally built around, could not do the one thing I ultimately wanted it to do: tell an individual person what to change. It could describe populations and show associations, but it could not take one person’s situation and turn that information into a clear recommendation for what they should actually try next.That post ended with a promise that the next one would explain what replaced it.A lot
Abdominal Pain Isn't Always About Damage (opens the original)
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Abdominal pain is one of the hardest symptoms in medicine to measure. We ask everyone to rate it from one to ten, even though that number has no shared meaning.That number gets treated like data. It goes in the chart and shapes what happens next, but it is one of the few numbers in medicine with no objective reference behind it. Sleep has hours. Weight has pounds. Even bowel habits have a scale with pictures next to it. A six means something different to every person who says it, and sometimes t
Inside Ultra-Processed Foods (opens the original)
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Few topics in nutrition have moved as fast as ultra-processed food. A term that barely existed in public conversation fifteen years ago is now embedded in national dietary guidelines, contested in legislatures, and cited for nearly every modern health problem from weight gain to mental health.Most of that attention lands on the same explanation: these foods are engineered, calorie-dense, and easy to overeat. For general health, that’s a real part of the story. For the gut, it’s largely beside th
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