Avicenna Viewpoint about Health Preservation through Healthy Nutrition Principles

According to Traditional Iranian Medicine (TIM), health preservation and disease prevention are prior to disease treatment. To get this aim, there are recommendations in TIM such as appropriate physical activity (1) and appropriate nutrition which are introduced as two parts of six principles for healthiness (2). Today, these two factors are very important for health preservation and disease prevention too (3). Representing viewpoints of Ibn Sina (Avicenna), one of the greatest Iranian medical scientists about nutrition is the purpose of this study in order to find out the best quality of nutrition because nutrition is one of the most important things to survive man, which is effective in all aspects of his/her life. Therefore, health and disease of an individual, society, and generations depend on it. In addition, focusing on nutrition has been the main issue in medical sciences in ancient medicine references. Quality of nutrition and the type of food have played a substantial role in organizing medical science (4). According to Avi-cenna's viewpoint, there are eight important and effective principles in relation with nutrition to be more useful in order to preserve health and prevent from disease include: 1-The quality of nutrition should be according to his/her temperament (Mizaj) and in general, he/she should eat some foods in balance with his/her temperament. 2-Since digestive system is strong in winter and weak in summer, individuals should eat nutri-tive foods in winter and foods which are easy to digestion in summer. 3-The type and quality of foods which are eaten should be in accordance with personal activities and efforts. For instance, athletes should eat more nutritive foods. 4-It is necessary to consider digestive system power, i.e. anyone whose digestive system is strong can eat foods which are difficult to digestion and conversely, anyone whose digestive system is weak can eat foods which are easy to digestion. 5-Middle-age people should eat less than before. 6-Healthy nutrition and habits should be observed in various regions and climates. 7-The sequence of eating foods should be based on its digestion time. Some foods are digested early and the others are digested lately. Thus, foods should be eaten in proper time both in order to preserve nutrients of foods and to prevent from food degradation within stomach .