Extended fasting — going beyond 24 hours without food — is an advanced practice that many experienced keto dieters use to accelerate fat loss, deepen autophagy, and reset metabolic health.
Only those who are already well fat-adapted (3+ months on keto) should attempt extended fasts. It is not appropriate for pregnant women, those with eating disorder history, or those on medication without medical supervision.
Eating one meal a day (OMAD) is effectively a 24-hour fast. It is the most approachable form of extended fasting and fits easily into daily life.
A 36-hour fast — for example dinner on Monday to breakfast on Wednesday — significantly deepens ketosis and cellular autophagy.
Reserve these for experienced practitioners. Medical monitoring is recommended. Electrolyte management is critical during 48-hour fasts.
Do not break a long fast with a large meal. Start small: bone broth, a few olives, a small amount of fat. Then have a proper keto meal a few hours later. Our keto beverages — especially bone broth — are perfect for breaking fasts gently. Follow with foods from our keto breakfast recipes.