Holistic Install #047: The Human Baseline

FDA is asking how generative-AI-enabled medical devices should be assessed before launch and monitored after launch.

That makes one low-tech habit more valuable: keep a short record of how you actually feel before the app tells you what the data means.

Print this one for your household wellness binder. Today’s install is THE 7-DAY HUMAN BASELINE. It takes about two minutes a day and gives you a simple record of sleep, energy, stress, and discomfort before an app interprets the data for you.

On August 18, 2026, the FDA opened a public discussion about how generative-AI medical devices should be evaluated before launch and watched after launch. The agency specifically raised questions about risk, premarket testing, postmarket monitoring, foundation models, and agentic AI. The paper is not final guidance. It is an early request for feedback. That makes one household idea useful right now: when software can change, keep one simple record that does not.

In 1948, researchers started the Framingham Heart Study in Framingham, Massachusetts. They recruited 5,209 men and women from the town. The idea was unusual for its time: do not wait for one dramatic event. Follow the same people again and again.

Participants returned for repeated exams. Researchers recorded things such as blood pressure, blood chemistry, smoking habits, medical history, and other health measures. Over time, those repeated records helped scientists see links that one office visit could miss.

Today, words like “risk factor” sound normal. Framingham helped make that way of thinking common. High blood pressure, smoking, high cholesterol, obesity, diabetes, and inactivity became easier to study because researchers could compare a person’s later health with what had been recorded earlier.

The key was not one perfect measurement. It was the baseline plus the next measurement, then the next one after that. A number gained meaning because there was something to compare it with.

Your seven-day note is not a medical study, and it cannot diagnose anything. The scale is completely different. But the narrow lesson travels well: memory is weak at comparing ordinary days. A small record can show what “normal for me” looked like before a new routine, a bad week, or a changing device score.

That is why a baseline matters. It does not tell you what a symptom means. It gives you a clearer starting point for noticing change and asking better questions.

Around 400 B.C., writings now grouped in the Hippocratic Corpus began recording illness as a sequence of observations. In books called Epidemics, case histories often followed people across several days instead of describing only one moment.

The writers noted fever, sleep, appetite, breathing, pain, urine, stools, sweating, and other visible changes. Some entries marked what happened on the third day, sixth day, or another point in the illness. That day-by-day habit mattered because the course of a problem could change.

Ancient Greek medicine also carried beliefs that modern science has rejected. We should not copy the treatments or assume those writers understood disease the way medicine does today.

But one useful habit survived: write down what you actually observed before building a story around it. That protects you from a very human mistake. We remember the worst night. We forget the five ordinary nights that came before it.

Modern devices can collect far more information than an ancient physician could imagine. The narrow comparison is about the human layer beside the machine layer. “Slept six hours. Energy 2 out of 5. Stress 4 out of 5.” That note is crude, but it is easy to understand later.

A notebook does not replace a clinician, a test, or a medical device. It gives you one stable reference point when your routine changes or when the software interpreting your data changes.

Across BOTH examples, the pattern is this: a trend becomes easier to see when you keep the same simple observation over time.

Do not try to track everything. Pick the same four simple observations for seven days. A small baseline you can understand is more useful than a giant pile of numbers you never look at.

Measured improvement: you now have a human baseline that does not disappear when an app updates.

□ Note created
□ Four measures chosen
□ Day 1 logged
□ Seven-day review date set

The best tool today may already be in your pocket: a plain phone note. Paper works too. The point is to keep one small record in a format you can still read even if a health app changes its score, layout, or model.

Keep one simple record that belongs to you, not the app.

To your health,
Nick Anderson

Simple observations make better routines easier to see.

P.S. If you tracked one thing for seven days, would you pick sleep, energy, stress, digestion, or movement? Hit reply and tell me. If this simple baseline would help someone you know, forward this issue to them.

Sources reviewed: FDA, Aug. 18, 2026 on generative AI-enabled medical devices; National Heart, Lung, and Blood Institute material on the Framingham Heart Study; historical scholarship on Hippocratic case histories. Educational information only, not medical advice.