Funny thing you should mention diet pills, I too noticed that after I took them I smelled awful. I took a total of six a day; three when I woke up in the morning and three around 2:00-3:00pm noon, shed pounds like crazy! I think these things intensified my Body Odor to the point to where I was able to notice it myself(I never was able to notice it myself)I can recall mornings after taking the pills when I'd walk outside my house to smell what I thought was a busted sewer main! Or sometimes I'd smell smoke; it was so strong that I thought that there was a fire somewhere!
I'm 32 5'9" 172 never smoked or drank alcohol