Unfortunately, there is no scientific evidence to suggest that any particular food can increase breast size. However, maintaining a healthy weight and exercising regularly can help improve the appearance and shape of your breasts. Eating a healthy, balanced diet may also help your overall health and well-being. Some foods that can help with general breast health include nuts, seeds, and healthy fats such as olive oil and avocado. Additionally, consuming more fruits and vegetables may help to provide your body with essential vitamins and minerals.