Track the fast. Feel the fire.
Intermittent and extended fasting, with ketones, glucose, and weight — logged in one motivating place.
A project by Tor Miller
Choose Your Fasting Style
Find the perfect fasting protocol for your lifestyle and goals
16:8 Intermittent
Fast for 16 hours, eat within 8 hours
- Beginner-friendly
- Fits most lifestyles
- Proven weight loss
- Mental clarity boost
OMAD (23:1)
One meal a day for maximum benefits
- Enhanced autophagy
- Deeper ketosis
- Time efficiency
- Rapid results
Extended Fasts
36-72+ hours for cellular regeneration
- Maximum autophagy
- Stem cell renewal
- Deep healing
- Growth hormone boost
The Science of Fasting
Understand the powerful biological processes that make fasting so effective
Autophagy
Your body's cellular recycling program kicks into high gear during fasting. Damaged proteins and organelles are broken down and recycled, leading to:
- Cellular repair and renewal
- Reduced inflammation
- Enhanced longevity
- Disease prevention
Ketogenesis
When glucose is depleted, your body switches to burning fat for fuel, producing ketones that provide:
- Stable energy levels
- Mental clarity and focus
- Rapid fat loss
- Neuroprotection
Live Community Board
See who's fasting right now and get inspired by our amazing community
Live Fasting Leaderboard
Join the community of fasters on their journey to health
The Leaderboard is Quiet... For Now
Fasters will appear here as soon as they begin tracking!
Sample Fasters:
💪 Why We Fast
Autophagy
Cellular repair and regeneration
Ketogenesis
Fat burning for energy
Mental Clarity
Enhanced focus and cognition
💧 Stay Hydrated & Energized
✅ What You Can Have
- Water (add sea salt for electrolytes)
- Black coffee
- Plain tea (green, black, herbal)
- Sparkling water
- Electrolyte supplements
❌ What Breaks Your Fast
- Any food
- Milk or cream in coffee
- Diet sodas
- Artificial sweeteners
- Gum or mints
🌟 New to Fasting?
Starting your first fast can feel overwhelming. We've got you covered with helpful guides and resources.
New to Fasting? Here's What to ExpectFrequently Asked Questions
What is Fast Tracker?
Fast Tracker is a free web app for tracking intermittent and extended fasts. You can log ketones, glucose, and weight, follow educational guides, and optionally connect AI agents through MCP.
Can I log glucose and ketones?
Yes. Signed-in users can log ketone and glucose readings alongside fast history, weight, and hunger notes so patterns are easier to review over time.
Does Fast Tracker work with AI agents?
Yes. Visit the MCP connect docs, paste the prompt into an MCP-capable agent (such as Cursor, Claude, or ChatGPT), and authorize Fast Tracker in your browser. You can revoke access anytime in settings.
Is Fast Tracker medical advice?
No. Fast Tracker is for personal tracking and education. It is not a medical device or clinical advice. People with medical conditions or who are pregnant should consult a clinician before fasting.
New here? Read who should not fast or connect an AI agent.
Ready to Transform Your Life?
Join thousands of people who are already experiencing the incredible benefits of fasting.
Start Your Fast Today