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CGM 101

Client name: Ruth

Your glucose, hour by hour

Show me my average daily glucose trend

90 100 110 120 130 mg/dL 12 AM 3 AM 6 AM 9 AM 12 PM 3 PM 6 PM 9 PM lowest highest

Averaged over 131 days of FreeStyle Libre readings, Feb 24, 2023 – Jul 9, 2026. Each dot is that hour's average across all of them. The bar through each dot shows how much that average might shift with a different set of days. Shorter bar, surer number.

What is my typical daily glucose pattern?

Your glucose dips overnight to a low around 3 AM, peaks around 1 PM, and has a smaller second rise around 8 PM.

When is my glucose typically highest and lowest?

Lowest
88 mg/dL
around 3 AM
Highest
123 mg/dL
around 1 PM
The numbers behind this chart
HourAverage mg/dL Likely rangeDays
12 AM10098–102121
1 AM9492–96119
2 AM9089–92119
3 AM8886–90119
4 AM8987–90119
5 AM8988–90120
6 AM9694–98120
7 AM107104–111119
8 AM10199–104120
9 AM102100–103120
10 AM103101–105121
11 AM102100–104121
12 PM110107–113121
1 PM123120–127121
2 PM115112–118120
3 PM111109–114120
4 PM105102–108119
5 PM106103–109118
6 PM108105–110121
7 PM113110–117120
8 PM120116–124120
9 PM117113–120121
10 PM113110–116121
11 PM106103–109121

What do you want to know next?

Each one runs on your own export. What you asked is written down with today's date before anything is computed, so the question stays separate from the answer.

Did the change I made work?

Pick a date you changed something — a supplement, a medication, a new routine — and get the before and after.

Needs one date from you. Before calling anything real, it checks whether a shift that size also shows up on dates when nothing changed.

Ready when you send a date

What is causing my spikes?

Two answers, and they are not the same size. From the readings alone you get WHEN you spike: every rise above your own baseline, how high, how long, and which clock times it keeps happening at.

Naming the cause needs something logged beside the glucose. Tell us what you already track and we will use it; anything you don't track yet takes about two weeks of logging first.

Partly ready · the spikes now, the causes once something is logged

Something else?

Write the question in your own words. If your data can answer it, you get a page like this one. If it cannot, you get a straight explanation of what is missing.

A person reads every one of these

Any questions or comments, please reach out to bill@persci.app. A person reads every one.

Made by PerSci from your CGM export. It describes a pattern in your readings; it is not medical advice.