What Is Water Fasting? Experts Explain Its Benefits and Risks

In the quest for weight loss and better health, many people try various diets—from keto to liquid diets. One extreme form of liquid diet is water fasting, where only water is consumed for a certain period.

But is water fasting truly beneficial? Or can it harm your body, which needs a variety of nutrients to function properly? Let’s explore what experts say about this trend.


What Is Water Fasting?

Water fasting means consuming nothing but water for a set time, avoiding all solid foods and other drinks. It’s sometimes used to detoxify the body, aid in weight loss, or give the digestive system a break.

Expert Opinion

Priya Paliwal, Chief Dietician at Shri Balaji Action Medical Institute, Delhi, explains that water fasting can help detoxify the body, reduce hunger pangs, and improve insulin sensitivity—but only if done carefully and for a limited time.


Benefits of Water Fasting

  • Detoxifies the body by giving the digestive system rest

  • Helps control hunger and may aid in weight loss

  • Can improve insulin regulation, beneficial for metabolic health

  • Sometimes used for spiritual or mental clarity reasons


Risks and Disadvantages

Water fasting is not without risks. Extended fasting can:

  • Weaken the body, cause dizziness and fatigue

  • Lower blood pressure dangerously

  • Cause blood sugar drops, especially risky for diabetics

  • Lead to headaches, nausea, and general weakness

It can be particularly dangerous for people with diabetes, heart conditions, or blood pressure issues.


How Long Should You Fast?

Experts strongly recommend limiting water fasting to one or two days only and always under medical supervision. It’s important to:

  • Get a health checkup before starting

  • Avoid exercise and take plenty of rest during the fast

  • Stop immediately if symptoms like nausea, headache, or weakness appear