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. Protein supplies as much as fifteen percent of calories in the body. To determine the amount of protein needed by an athlete, the following factors should be considered: his fitness level, the type of exercise along with its duration and intensity, and his overall carb and calorie intake. The last fuel source that is important for natural sports nutrition is fats. The nutraceutical industry is concerned with nutraceuticals, that is, food or part of a food that offers medical and/or health benefits including prevention or treatment of disease. All therapeutic areas such as anti arthritic, cold and cough, pain killers, digestion, sleeping disorders, blood pressure, cholesterol, prevention of certain cancers, osteoporosis, depression and diabetes are covered by nutraceuticals. Some athletes also have low nutritional levels because of certain factors. One is poor understanding of sports nutrition principles. They think that eating many will make the healthy. Nutritional requirements also differ among people depending on their training program and personal characteristics like age, sex and body type. Oftentimes, certain campaigns are purely aimed at providing education about sports nutrition but there are others which launch such programs in support of a sales and marketing strategy. One should be careful with these types as the efforts may be too sales-oriented and may take for granted individual needs and concerns. These protective substances are commonly known as phytochemicals. Phytochemicals means "chemicals from plants." Vegetables and fruits therefore are excellent sources. Color means protection Colorful vegetables and fruits have high levels of phytochemicals. In most cases, colorful skins of fruits and vegetables have the most concentrated source of protective nutrients.