Just as a house cannot without a good foundation. Similarly, you cannot hope of building a good body without a strong foundation. Lifting heavy weights and exercising may be the key components of body building but they are of no use without proper diet and nutrition. a key component of body building because without it the workout will not be as effective. Without proper diet and nutrition, you will also not have the required strength to work out. Many people think that body building is not possible without supplements, vitamins and minerals.
While they do have their place but just plain old good eating habits can go a long way to building your body. While you can eat a candy bar and have soda occasionally but this should not be your only source of nutrition as you need to find the right balance between carbohydrates and proteins to allow your body to grow properly. You may need to bulk up on carbs going into a competition and eat spaghetti and noodles but for everyday eating you need to go for a diet.
Whole grain bread should be used instead of normal bread along with fruits, grains and vegetables. Whether you are truly serious about bodybuilding and want to enter a competition or you are just working out with your friends to lose some weight, you still need proper nutrition. For this purpose you can visit your medical professional before you start working out or you can check any body building magazine as they devote at least one article a month to nutrition.