WATER FOR LIFE. You must replace this in your body throughout the day, and regularly, every day! A 90 kg bodyweight. This will need total water daily from all inputs , including all food sources,of 2500 grams. Equivalent to 10 large glasses of water. For example drink 6 and eat 4 glasses of water through food. Sufficient Water is the critical, most vital component of your body systems, and your life. Your body cells and organs help fight infections and REMOVE TOXINS using the water. Your own body needs will swing depending on your physical activity, sport, pregnant, resting, and hot or cold weather. Refer to your doctor for critical health conditions.