While at first glance it may seem that a person who suffers from food allergies may find weight loss easier, the opposite may actually be the case. If you are not able to eat certain fruits, for instance, your nutrition may be thrown off, causing you to crave things like sugars. In that case you may make up the calories with other, less nutritious alternatives. The best way to ensure that your weight loss program is successful, is to ensure that your body is receiving all the nutrients it needs, not rely on external factors to help you deprive yourself.