Health Disclaimer
Effective date: August 22, 2026
Fast Day Check-In is a motivational and personal tracking tool. It is not a healthcare provider and does not provide medical, nutritional, diagnostic, treatment, or mental-health advice.
Speak with a healthcare professional
Fasting is not appropriate for everyone. Consult a qualified healthcare professional before beginning, extending, or materially changing a fasting or weight-management plan.
This is especially important if you:
- Have diabetes, hypoglycemia, or another blood-sugar condition
- Take insulin or other medications affected by food intake
- Are pregnant, trying to become pregnant, or breastfeeding
- Are under 18
- Have a current or past eating disorder
- Have kidney, liver, heart, gastrointestinal, or metabolic conditions
- Are underweight, frail, recovering from illness, or preparing for surgery
- Have been advised by a healthcare professional not to fast
Listen to your body
A fasting timer is not a medical clearance to continue fasting. You may stop a fast at any time. Ending or adjusting a fast is not a failure.
Stop fasting and seek appropriate medical assistance if you experience concerning symptoms such as fainting, confusion, chest pain, severe weakness, persistent vomiting, difficulty breathing, or symptoms of dangerously low blood sugar or dehydration.
If you believe you are experiencing an emergency, call 911 or your local emergency number.
Hydration and nutrition
The website does not determine your individual hydration, calorie, electrolyte, medication, or nutritional needs. These needs vary and may be affected by health conditions, activity, climate, medication, and fasting duration.
Research information
Research summaries on Fast Day Check-In are presented for general education. Scientific findings may change, and individual studies do not guarantee that the same results will apply to you.
Current evidence does not establish fasting as uniquely superior to every other sustainable approach to weight management. Individual suitability, adherence, health status, and professional guidance matter.
Weight and progress information
Weight naturally fluctuates. Charts, completion percentages, streaks, and other visual summaries are based on user-entered information and should not be interpreted as medical measurements, diagnoses, or guarantees.
No professional relationship
Using FastDayCheckIn.com or contacting us does not create a doctor-patient, dietitian-client, therapist-client, or other professional healthcare relationship.
Contact
General website questions may be sent to hello@fastdaycheckin.com. Do not send urgent medical questions or emergency information by email.