A 16-hour fast and a 72-hour fast are not the same intervention. They access different phases of the same biological sequence. Here's the complete timeline of what your body is actually doing - and when.

Ghrelin - the hormone that drives hunger - is entrained to your eating schedule, not your calorie intake. Most of what feels like hunger during fasting is scheduled hunger, not starvation. Here's what the timeline actually looks like.

Only 12.2% of American adults are metabolically healthy. That means roughly 88% are walking into a fast with a metabolism that hasn't been trained to make the fuel switch. Here's what that means - and how to fix it.

Fasting, exercise, and diet each do something the others can't. Here's what makes extended fasting unique — and why all three work better together

Fasting is powerful, but it’s not harmless. This article covers the most important risks and downsides of extended fasting, backed by physiology, data, and real experience, to help you avoid common mistakes.

How fast do ketones rise during fasting? In my 7-, 9-, and 10-day water fasts, I tracked how quickly I entered ketosis and what made the biggest difference. Turns out, movement early in the fast helps you reach deep ketosis faster — and burn more fat along the way. Here’s how glucose drops, ketones rise, and why fasting ketosis is totally different from dangerous ketoacidosis.