They ate several variety of cereals, vegetables, fruits (fresh and dried), and lots of wine (usually diluted with water in varying degree). Early Greeks main meat source is that of goats. In Italy it was pork meat products specially bacon. Beef was occasionally eaten, particularly after sacrifices in numerous temples. Vitamin D is so important to calcium that there will be loss of calcium if vitamin D is lacking in the body. Omega 3, a fish essential oil for sports nutrition A can of tuna or the fatty parts of a fish such as the belly and the head contain omega 3, a fatty oil that is good for the heart. Omega 3 helps the heart to pump well and clears the arteries of bad cholesterol. Sources of Fuel A balanced diet is another must for natural sports nutrition. Athletes must acquire the perfect combination of calories that can be consumed from protein, carbohydrates and fats, which are great sources of energy. Carbohydrates are the most important fuel source, which can be found in foods such as breads, pastas, rice, fruits, veggies and cereals. You must also take note of nutrition requirements that are related to your training program. Failure to recognize these said requirements would bring bad effects to your health status. Why? You might be taking carbohydrates all right but not in the right amount or in the amount that is appropriate for you. This does not mean to say that men are completely immune, only that since women have ongoing cycles inside their body, it is highly imperative for them to keep nutrients up to be able to prevent disorders. The key nutritional issues in sports nutrition for women include calcium and iron. Weight control and eating disorders are also concerns of sports nutrition for women. Carbohydrates are the most important fuel source. It provides a minimum of sixty to a maximum of seventy percent of our calories. Carbohydrates are found on almost all of the food you consume. Food rich in carbohydrates are fruits, vegetables, pastas, breads, cereals, rice and many more that are too many to mention.