Intermittent Fasting Overview and Details
Learn about intermittent fasting, its various methods, health benefits, and tips for getting started. Discover how this eating pattern may support weight loss, metabolism, and overall wellness.

Written by Dr. Rohinipriyanka Pondugula
Reviewed by Dr. Md Yusuf Shareef MBBS
Last updated on 13th Aug, 2025

Intermittent fasting (IF) is not a diet but an eating pattern where you cycle between periods of eating and fasting. Unlike traditional diets that focus on what to eat, IF focuses on when to eat. It has gained popularity for its potential health benefits, including weight loss, improved metabolism, and better blood sugar control.
How Does Intermittent Fasting Work?
When you fast, your body goes through several changes:
- Insulin levels drop, helping your body burn stored fat for energy.
- Human Growth Hormone (HGH) increases, aiding muscle growth and fat loss.
- Cellular repair processes begin, removing waste from cells.
- Gene function improves, which may protect against diseases.
Popular Intermittent Fasting Methods
There are different ways to practice intermittent fasting. Choose one that fits your lifestyle:
1. 16/8 Method – Fast for 16 hours and eat within an 8-hour window (e.g., 12 PM to 8 PM).
2. 5:2 Diet – Eat normally for 5 days and reduce calories to 500-600 for 2 non-consecutive days.
3. Eat-Stop-Eat – Fast for 24 hours once or twice a week.
4. Alternate-Day Fasting – Fast every other day (some versions allow 500 calories on fasting days).
5. Warrior Diet – Eat one large meal at night and fast during the day.
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Health Benefits of Intermittent Fasting
Below are the health benefits of intermittent fasting,
1. Weight Loss & Fat Burning
Fasting helps reduce calorie intake and boosts metabolism, leading to fat loss while preserving muscle.
2. Improved Insulin Sensitivity
IF lowers blood sugar levels and reduces insulin resistance, which may lower the risk of type 2 diabetes.
3. Heart Health
It may improve cholesterol levels, blood pressure, and inflammation, reducing heart disease risk.
4. Brain Health
Fasting increases brain function, supports nerve cell growth, and may protect against Alzheimer’s and Parkinson’s.
5. Longevity & Cellular Repair
Studies suggest IF may extend lifespan by promoting cellular repair and reducing oxidative stress.
Who Should Avoid Intermittent Fasting?
While IF is safe for most people, it may not be suitable for:
- Pregnant or breastfeeding women
- People with a history of eating disorders
- Those with diabetes or low blood pressure (consult a doctor first)
- Underweight individuals or those with nutrient deficiencies
Tips for a Successful Intermittent Fasting Routine
Below are the tips for successful intermittent fasting routine,
1. Start Slowly – Begin with a 12-hour fast and gradually increase.
2. Stay Hydrated – Drink water, herbal tea, or black coffee to curb hunger.
3. Eat Nutrient-Dense Foods – Focus on proteins, healthy fats, and fiber to stay full longer.
4. Listen to Your Body – If you feel dizzy or weak, break your fast and eat something light.
5. Combine with Exercise – Light workouts during fasting can enhance fat burning.
Common Challenges & How to Overcome Them
- Hunger Pangs – Drink water or herbal tea; hunger usually subsides after a few days.
- Low Energy – Ensure you eat enough calories during eating windows.
- Social Situations – Plan fasting around events or adjust your eating window occasionally.
When to Consult a Doctor?
If you experience severe fatigue, dizziness, or digestive issues, consult a healthcare professional. People with chronic conditions (diabetes, thyroid disorders) should seek medical advice before starting IF.
Need Personalized Guidance?
If you're unsure whether intermittent fasting is right for you, consider booking a consultation with a nutritionist or doctor through Apollo 24|7. They can help create a safe and effective plan tailored to your health needs.
Conclusion
Intermittent fasting is a flexible and effective way to improve health, but it’s not a one-size-fits-all solution. The key is to find a method that works for your lifestyle and listen to your body. With patience and consistency, IF can be a powerful tool for better well-being.
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