Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 1 month ago

We are been advised to eat less and leave the food when you are still feel wanting to eat more. That will then leave space for drinks and breathing. It comes from your personal experience which makes you able to estimate the one third for food and the other third for drinks and the last third for breathing properly with out feeling full or heavy.