I started undergrad as a biology major but then at the end of my freshman year I changed to biochemistry. Then, midway through my first semester of sophomore year I decided to go back to a bio major because I regretted changing thinking upper chem courses would lower my gpa. Now fast forward to first semester junior year, I changed back to biochemistry after doing very well in upper biochem courses that I was able to take as bio credit and because of a new found interest in learning more chemistry. Im going to stay as biochem for sure now. Will it raise any red flags that I changed my major back and forth like this when I apply to med school?