Not a Substitute for Professional Medical Advice
Always seek the advice of a qualified healthcare provider, physician, or registered dietitian before starting any intermittent fasting regimen, especially if you:
- Have a medical condition (diabetes, heart disease, kidney disease, etc.)
- Are pregnant, planning to become pregnant, or breastfeeding
- Have a history of eating disorders
- Are underweight or have nutritional deficiencies
- Take prescription medications, especially those requiring food
- Are under 18 years of age
- Have recently had surgery or are recovering from illness
Calculator Limitations
The metabolic analysis, BMR calculations, ketosis estimates, and autophagy timelines provided by our calculator are based on general population research and mathematical models. Individual metabolic responses vary significantly based on genetics, body composition, diet history, sleep quality, stress levels, and other factors. These estimates should not be treated as precise medical measurements.
No Liability
The creator of FastingTool.org (Sarah) and the website itself assume no liability for any health outcomes, injuries, or adverse effects resulting from the use of this website, its tools, or the information contained herein. You assume full responsibility for your health decisions.
Personal Experiences vs. Medical Facts
Blog posts on this website describe the personal experiences of Sarah, a graphic designer in Austin, Texas. These are anecdotal accounts, not clinical studies. What worked for Sarah may not work for you. Individual results vary.
When to Stop Fasting
Stop fasting immediately and seek medical attention if you experience: dizziness or fainting, severe headache, chest pain, irregular heartbeat, extreme fatigue, confusion, or any symptom that concerns you. Fasting should never cause suffering.
Questions?
If you have questions about whether fasting is appropriate for your specific situation, please consult a healthcare professional. Do not rely on internet tools or blogs for personalized medical guidance.