Choosing the Right Major-Advice (Purdue)

Hi, I am about to be a sophmore at Purdue. Im majoring in Health Sciences with a Pre-Med concentration. Im planning on applying to medical schools in California specifically the UC’s. I wanted to know if I should change my major to Biology. My issue is that if I change my major ill lose the premed advising. The major is made in a way where the pre med requirements are in tje major. But if I change to a major that has more students doing pre med ia that good? Is it too late to change majors? Please let me know. Your answers are much appreciated. Thank you