Optimal fluid intake in daily diet: Avicenna's view.

Adequate daily water consumption is an important factor of keeping regular homeostasis. However, the best quantity of daily water consumption for a healthy individual is not virtually stated in the literature. Despite the dearth of evidence-based recommendations, it is commonly thought that ingesting eight glasses of water a day is good for a healthy person. Avicenna had a unique viewpoint. He believed that daily water intake depended on numerous elements together with age, intercourse, body temperament, season, occupation and various internal and external elements. He also cited a few essential and useful measures regarding proper water consumption, which have additionally been emphasized in Islamic hadiths.

Principles of nutrition in Islamic and traditional Persian medicine.

Nutrition has a crucial role in maintaining body health. Eating and drinking has a special place in Islamic doctrine and traditional Persian medicine. Traditional Persian medicine is a holistic medicine and provides great attention to the spiritual aspects of life as well as somatic aspects to maintain human health. In this view, people are not going to eat and drink for pleasure but to maintain a good life and physical health, due to daily tasks, as well as observing moral aspects of a human life and spiritual satisfaction.