Other Vitamins and Minerals. Other nutrients can also help relieve muscle pains. A magnesium deficiency can cause muscle weakness and pain, while a lack of other B vitamins, like riboflavin, can also lead to muscle cramps and pain.
So my answer is that getting into medical school is pretty darn difficult. If you take a look at the medical school requirements page, you can see that I recommend a GPA of at least 3.5 and a MCAT score of at least 30. With these scores, you should have a chance to get into medical school. However, your chance for getting in also depends on the color of your skin.
If you want to get accepted into a medical school education program, you can never let up your guard. A grade of D or F in any class, but especially a core curriculum class will weigh heavily against your odds of acceptance. Bad grades are highly frowned upon.