Will you lose weight if you are 5'8 and 165 pounds if you eat normally but run 1 mile a day?

1 salad is not enough to sustain you so that you can actually run the 3 miles. You will end up hurting your body more than helping. What you should do is eat your usual foods, just cut the portions in half. Add a salad to lunch and dinner - eat it first, then eat the meal so you end up eating less. Cut your fast food or TV dinners, processed foods and fast foods are not healthy. Just make a few little changes and you will find you can actually stick to your new way of life (don't call it a diet, you aren't refusing yourself anything, just adding better foods and eating less). Run those 3 miles in the morning right after you take your vitamins with a small glass of water. Then eat breakfast and go about your day. Your body benefits most from morning exercise and your vitamins absorb best when you are active. You get a double benefit right there. Be sure your vitamins are made from whole foods, don't buy off the shelf. Buy from an MLM company because they are required to never be more than 1-2% off in their ingredients (while store bought vitamins, including GNC can be as much as 40% off). Melaleuca, Shaklee and Nikken all carry a great line of vitamins. Look for the vitamin which has at least 100% Biotin (great for weight loss).