i'd have to respectfully disagree. Masters programs are very costly and timely and with no linkage there is no guarantee it will help you get into medical school, so those are the biggest factors i think to consider, but also the type of Masters you complete. I do think completing MHAs, MPHs in a non science specialization, or an MA may not help much, but if your program is catered toward medical school, I think it can be impactful. I completed a masters of medical science at the University of South Florida's College of Medicine, it was a l year masters, in which I took Pharmacology, Physiology, Neurology, Histology, Anatomy, Embryology, Biochemistry, Immunology/Microbio, Genetics, Gross Anatomy (with full cadaver dissections), and Health Science Ethics. All these were in the medical school, taught by the same exact professors. This program pretty much mirrored the first 2 years of medical school, and I had a ton of classmates who after failing to matriculate multiple cycles, got a 3.5 and above in this program and got into medical school this year. Now I will say that a masters is going to cost you and if you don't get a 3.5 + gpa in a masters program like this, it can also be a huge red flag for medschools, but if you do well it can say a lot about your ability to perform at that level. That all being said, you may very well be able to gain the same results from just taking courses, but I think for MD programs its not as impressive to go back and retake the same undergraduate courses and ace them the second or third time(grades are averaged) as opposed to challenging yourself and acing an upper level course the first time. Another benefit of a graduate program is that you will get a separate gpa on your AMCAS and a 4.0 graduate gpa has the potential to stand out and make an upward trend more prolific.This is all simply opinion. I don't think there is a clear answer to what is the right way to go in this case, because there is no clear path to medical school, and there is no ADCOM that is built alike..they are all looking for something different and that something changes with every new class. I think whatever you decide to do can be impactful if you go at it whole heartedly and put forth maximum effort.