Log your last meal and track your fast in real time.

or

Set the time of your last meal:

No meal logged yet — tap the button or set a time above

Your fasting goal:

Hours Fasted

Log a meal to start

Time Until Goal

Eat Window Opens

Your fasting timeline

4h

Digestion Complete

Stomach empty, insulin falling

8h

Fat Burning Begins

Glycogen depleting, fat mobilizing

12h

Glycogen Nearly Gone

Metabolic switch underway

14h

Ketosis Starts

Ketones in bloodstream, HGH rising

16h

Deep Fat Burning

HGH peaks, insulin at daily low

18h

Autophagy Begins

Cellular cleanup, protein recycling

24h

Full Autophagy

Immune reset, gut fully resting

36h

Deep Ketosis

Ketones as primary brain fuel

48h

Stem Cell Production

Immune regeneration accelerating

72h

Immune Reset Complete

Significant cellular renewal

Choose your protocol

16:8

The daily standard

Best for beginners and sustainable fat loss.

  • Easy to maintain long-term
  • Improves insulin sensitivity
  • Supports steady fat loss
  • Fits most social schedules
Most popular
18:6

The sweet spot

Autophagy benefits with a manageable eating window.

  • Triggers daily autophagy
  • Accelerates fat loss
  • Reduces inflammation
  • Sustainable with practice
24hr

The deep reset

Maximum cellular repair and immune reset.

  • Full autophagy cycle
  • Powerful immune reset
  • Gut microbiome rest
  • Do 1–2x per week max

How to break your fast

What you eat first matters. Here's what your body needs.

Under 16h

Short fast — eat normally

Start with a balanced meal. Avoid a huge carb load. Your body is ready.

First foods:

Greek yogurt, eggs, avocado, fruit

16–24h

Medium fast — ease in gently

Start light. Wait 20 minutes before your main meal.

First foods:

Fresh fruit, small smoothie, or yogurt → balanced meal 20 min later

24–48h

Extended fast — bone broth first

Reactivate digestion gently. Bone broth first, then wait.

First foods:

Bone broth → 30 min → small protein meal (eggs, fish, chicken)

48h+

Long fast — very gentle refeeding

Take it slow over several hours. Don't shock your system.

First foods:

Bone broth only for 1 hour → soft foods (steamed veg, soft egg) → normal meals resume next day

Common questions