IntroductionBreast cancer is the most common cancer among women in the United States. One in eight women will have breast cancer in their lifetime. There have been recent studies suggesting that diet influences breast cancer risk. Some foods, such as fruits and vegetables, have been associated with a reduced risk of breast cancer, while others have been associated with an increased risk of breast cancer. A greater understanding of the association between diet and breast cancer may be used for preventative measures in the future. Experimental Design In recent years, extensive research has been conducted on how diet can influence breast cancer susceptibility. According to Link, much of the research conducted on the association between diet and cancer has focused on a specific ingredient or food, such as coffee, rather than the person's diet as a whole. To combat this problem, dietary patterns were established in the California Teachers Study (CTS) cohort. Five dietary patterns were established and evaluated. The established dietary patterns were: diet rich in vegetables (fruits and vegetables), diet rich in proteins and fats (meat, eggs, butter), diet rich in carbohydrates (pasta and bread), ethnic (legumes, soy, rice) , salad and wine (salad, fish, lean dressings, wine, coffee). Eating patterns were analyzed in a large group of women with a wide age range. The group used was large and diverse in many respects, although the majority of subjects were Caucasian. Dietary patterns and breast cancer incidence were evaluated to determine whether there was a correlation between diet and breast cancer susceptibility. The study also aimed to determine whether there was a correlation between dietary patterns and the receptor subtypes involved in breast cancer… half of the paper… dietary pattern. That is, some women may eat a wide variety of foods and may not fit into just one category. Analysis of the breast cancer risk of these women is less obtainable. Conclusion Breast cancer is the most common cancer among women, but for some it may be preventable. The risk of breast cancer depends on many factors, including genetic predisposition, environmental factors, diet, exercise and lifestyle. Diet and exercise are among the factors that can be changed to reduce cancer risk. Prevention is becoming increasingly important in the defense against cancer. As the CST study and many others have indicated, a plant-based diet may reduce susceptibility to breast cancer. This is especially true for ER-PR- breast cancers. In conclusion, a diet rich in fruits and vegetables and low in alcohol can help reduce susceptibility to breast cancer.