What we cannot conclude from prehistory

You cannot pick one ancestral diet

There is no single preagricultural plate. Tropical foragers, arctic hunters, and everyone in between ate different mixes of plants, animals, fish, honey, and starch. Averaging them into “the paleo diet” is a marketing move. It is not a finding.

Even one well-studied group does not sit still. Hadza intake of meat, honey, berries, and tubers swings hard by month. A yearly average hides the point: flexibility, not a macronutrient target.

Living foragers are not unmodified Pleistocene people. They trade, they meet outsiders, they live beside farmers. Using one camp as “what we evolved to eat” is a category error. Before agriculture: hunting, gathering, sharing stays with sharing and foraging. It still will not hand you a shopping list.

You cannot read 16:8 or OMAD off a fossil

Isotopes and starches do not encode meal times. A femur does not say “skip breakfast.” A grindstone does not say “eight-hour window.”

Time-restricted eating in humans tests a modern intervention in specific adults for weeks to months. That is the evidence shelf for daily windows. Prehistory is not a missing methods section for those trials.

One-meal days in a lean season are not OMAD as a lifestyle SKU. Common fasting schedules compares calendars you can choose. Fossils do not rank them.

You cannot turn hunger into a moral test

Hunger in a failed hunt is a signal about food in the world. Hunger on a weekday 16:8 is a signal about a rule you picked. Do not upgrade the second into virtue because the first is old.

Part 5 in this cluster is the dedicated note: hunger is a signal, not a moral test. Until it ships, Hunger comes in waves and When to stop a fast are the practice pages. A wave is not a badge. A stop sign is not weakness.

Do not use “ancestors endured worse” to talk someone out of eating. That is pressure, not history. This app’s friends tools are encouragement, not a dare.

You cannot borrow a clinic, a calendar, or a strike

A sanitarium water fast is not ancestral. Therapeutic fasting in the 19th–20th centuries already said so. A dawn-to-dusk holy day is a meaning, not a 16:8. Religious and spiritual fasts already said so. A hunger strike is speech. Fasting as protest and politics already said so.

Piling those onto “we evolved to fast” is how a store listing gets a fake deep past. From clinic to consumer app is the actual product story. Keep it on that shelf.

What we can say (and then stop)

Humans are flexible eaters. Meals were often uneven. Sharing mattered. Place and season mattered more than a numbered window.

Modern IF is a schedule you can try if it is appropriate for you, measured in elapsed time, with safety notes that outrank slogans. How to read fasting research is the method for the papers. Prehistory is not a substitute paper.

That is the whole fence. Before agriculture: hunting, gathering, sharing is the foraging chapter. Parts 3–5 fill in farming, daylight, and hunger without taking the fence down.

What this is not

It is not a paleo cookbook. It is not medical advice. It is not a takedown of any living community.

It is not Did ancestral humans “fast”?. That note is the question. This note is the list of illegal answers.

How this meets the timer

If you came here because a video said evolution wants you on one meal a day, you can close the video. Use the online fasting timer only as a clock for a plan you chose, usually a gentle window. Who should be careful with fasting still comes first.

The library’s job is to keep “natural” from turning into a dare. This page is that job in one place.