I'm 30yrs old, graduated with a BS in Bio, all the way back in 94!  I'm currently getting a master's degree in pharmacology, expect to finish by next dec or in the following spring. Decided I want to be a doctor about 2yrs ago.  Unfortunately for me, I am trying to make up for the sins of my youth (undergrad gpa was 2.8, yikes!). Thats what happens when you go to college with no real goals and a serious penchant for good times.  But, the times have changed and so have I.  I will be graduating from the master's program with no less than a 3.8 gpa and some solid research experience.  
I will be taking the mcat this August, and basically, everything will be riding on it.  I'm figuring that if I don't break 28, there is no point in even applying.  If i can break 28, maybe, just maybe,  the adcoms will see that i've got my **** together and at least want to meet with me for an interview.  We will see...
Anybody else in a similar situation?
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You may be done with the past, but, the past may not be done with you.