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  • CoreThe daily foundation.
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  • Our ApproachWho we are and how we formulate.
  • TimeTime is the ingredient.
  • IngredientsEvery ingredient, explained.
  • Quality StandardsThe testing behind every batch.
  • The MetabolistThe journal.
  • GlossaryThe language of fasting.
  • MeridianThe app that reads your fast.
  • FAQBefore you start.
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Shop all
  • TraceFasting hydration.
  • CoreThe daily foundation.
  • Find your routineA two minute quiz.
  • Our ApproachWho we are and how we formulate.
  • TimeTime is the ingredient.
  • IngredientsEvery ingredient, explained.
  • Quality StandardsThe testing behind every batch.
  • The MetabolistThe journal.
  • GlossaryThe language of fasting.
  • MeridianThe app that reads your fast.
  • FAQBefore you start.

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Time is the ingredient.

The Metabolist

The science of the fasted state: metabolic health, longevity and performance. Written and reviewed by the Kētos team.

Brain & Performance

The MetabolistFasting FundamentalsMetabolic HealthCellular Health & LongevityHydration & ElectrolytesBrain & Performance

Brain & Performance

Aug 19
15 min

Why You Get Hungry at 11am When Fasting: The Hunger Wall

You start to feel it around 11am with strange precision. You are fourteen hours into your fast and the morning has gone fine. But...

Brain & Performance

Why You Get Hungry at 11am When Fasting: The Hunger Wall
Aug 09
12 min

Fasting and Brain Fog: Why It Happens and How to Stay Sharp

It arrives mid-afternoon. You are eight or nine hours into a fast. It's a productive day, but somewhere around 2 or 3pm, the words...

Brain & Performance

Fasting and Brain Fog: Why It Happens and How to Stay Sharp

Reference

The fasting lexicon

89 plain-English definitions of the terms behind fasting, from autophagy to electrolytes.

Browse terms

The Journal, monthly.

One email a month. The science of the fasted state, no noise.

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These statements have not been evaluated by the Food and Drug Administration. Kētos products are not intended to screen, diagnose, treat, cure, or prevent any disease. Kētos products are intended to support fasting in healthy adults and are not a substitute for medical advice. Consult your healthcare professional before use, especially if you are pregnant or nursing, have a medical condition, take any medications, or are planning a medical procedure.
*Individual results may vary. Results depend on diet, lifestyle, fasting protocol, and consistency of use, and are not intended to represent or guarantee that every user will achieve the same or similar results.

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