Overview & Hydration Guidelines
During fasting, you lose water normally provided by food (approx 20% of daily intake). Extra water is required. Adequate fluid intake is essential to maintain performance, regulate body temperature, and offset fluid loss.
Frequently Asked Questions — Water Intake Calculator for Intermittent Fasting
Does drinking water break an intermittent fast?
No. Plain water contains zero calories and does not break a fast or trigger an insulin response.