One possible version :
Many students have no time for breakfast while others aren’t hungry in the morning. Some girls skip breakfast to lose weight.
Studies have shown skipping breakfast will affect our studies. If we don’t have breakfast, we will have not enough energy to focus on our study. Besides we will also have a poor memory and do poorly in exams. For those girls who want to lose weight, skipping breakfast will actually make them put on weight because they will be hungry and eat too much for lunch.
In my opinion we should get up earlier and allow time for a nutritious breakfast, which will improve our ability to learn and will also help to build up our body. Having a good breakfast means having a good day.