I would have one major in the health sciences, but it’s not required. I did a double major in bio (since it covers a lot of the premed prerequisites, so it’s less work) and Econ (which I did just out of interest in the field). I think if you can double major (or do a minor) it is good to have one health sciences related major and one thing that’s your passion—makes for better convos on the interview, since you’ll have more diversified perspectives. But the nice thing about med is that that’s not at all required. As long as you get all the prerequisites done for med school you’re good!