I think the allopathic schools sell older applicants short.
It can seem like this. But in general, I don't think this is true. The overall acceptance rate to medical school is about 40%. For those over 38, the acceptance rate is about 20%. About 12% of those accepted are 28 or older. So schools are definitely taking older applicants.
Most medical schools I applied to had no problem with my age. The school I attended embraced my age, and actively sought out older applicants. Other schools I interviewed at were similar (Albany, Eastern Virginia, Drexel, George Washington, Hopkins). In my situation, I applied at age 38 with a 3.6 GPA, 4.0 graduate GPA, 4.0 post-bacc GPA, 34 MCAT. I applied to 24 schools, interviewed at about 10, and was accepted to about 4. Here's what I suggest.
1. Ask for a debriefing from schools who interviewed you, but rejected you. Be extremely polite when corresponding with these programs. Many are willing to provide a letter detailing the weaknesses in your application. In addition, talk to your premed advisors to get their opinions on how you can improve yourself.
2. To be competitive, you need a 3.6 undergraduate GPA and 3.6 science GPA. If you don't have these, of if you took your prereq's at a community college, then consider getting a masters in biology, chemistry, or physics to improve your academic standing. (A masters in other areas like public health, behavioral science, etc. is not as good.) Because graduate grading is a bit more permissive, you'll likely need a 3.75 graduate GPA to be competitive.
3. You need a 30 MCAT to be competitive. If you have a low undergraduate GPA, then you'll need a higher MCAT (maybe 33 or better). If you are below this, or below 9 in any area, then you probably should retake the MCAT. For me, it was 10-12 years since I took my prereq's. I needed to study 40 hours a week for about 4 months to prepare for the MCAT. Do whatever it takes to ace this exam.
4. If it's been more than 5 years since you took science courses (bio, chem, phys), then take a couple courses. Most medical schools require this.
5. Use the premed committee from your current school or from any prior school you attended. This is very important, as it will give you access to additional resources and support.
6. Send in all materials ASAP. Apply on June 1st, the first day applications are accepted. Send in secondaries within a day or two of receiving them. Most schools get thousands of applications and have a rolling admissions policy. Sending your material in as early as possible will help your chances of getting accepted.
PM me if you have specific questions.