What happens to your body during a 36-hour waterless fast?
Devotees of Chhath Puja 2025 observe the 36-hour waterless fast known as Nirjala Vrat, which affects the body through dehydration, fat metabolism and electrolyte changes, offers spiritual benefits and requires attention to health.
Like chath Puja 2025 begins today, as millions of devotees in India and Nepal prepare for one of the most grueling fasting rituals in the Hindu tradition. Also known as 36-hour waterless fasting Nirjala vrat. This fast, held throughout the festival, involves abstaining from food and water from sunrise to sunset, reaching its peak by evening. Arghya (presentation) to the setting sun. This act of devotion is believed to purify the body and soul while offering gratitude to Surya Dev. Chathi maiya.
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Staying hungry and thirsty for 36 hours has significant effects on the body. Initially, the body relies on stored glycogen for energy, which can lower blood sugar levels and trigger mild fatigue. As fasting continues, the body moves into ketosis, burning fat for fuel, which can lead to temporary weight loss and lower blood pressure. At the same time, being dehydrated can cause dehydration, dizziness, headaches, dry mouth, and even electrolyte imbalance. Despite these challenges, many devotees report feeling mental clarity and spiritual renewal after completing the fast.
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While many safely observe Nirjala vratSome groups need to be careful. The elderly, pregnant women, children, and people with medical conditions such as diabetes, kidney problems, or hypertension should consult a healthcare professional before undertaking such a long fast. Ignoring these precautions can increase health risks and lead to serious complications.
36 hour waterless fast chath Puja is an extraordinary display of faith, discipline and gratitude. While providing spiritual and emotional benefits, the devotee needs to balance health and devotion, know his body’s limits and take necessary precautions. Performing this sacred ritual safely allows you to fully experience the purity, joy and devotion of the festival.
