Avoid Aspartame like the plague. You'll see people say (regarding Meniere's) that they've stopped drinking coffee, alcohol, soda and it helped with their attacks. The one thing many of those have in common is the wide popularity of "diet" or "lite" versions, usually containing Aspartame.

I noticed the same issues myself with Alcohol but it stopped almost completely once I switched to non-diet drinks (still in moderation, of course). Then I started getting attacks a little more frequently (the shorter "drop" attacks, though). I realized the only thing that had changed was that I'd started up again drinking diet soda containing, wouldn't you know it, aspartame. Since that moment I avoid it and it's served me well, along with consistent exercise.

I'm not a doctor, but I have a theory based on my observations that Aspartame compromises the strength of the barrier around the inner ear. Because of how I've felt the dizzy sensations start and eventually pass, I'm assuming fluid buildup causes the inner ear lining (probably scarred by now if my theory holds) to burst. This causes instant dizziness that subsides rather quickly at this point, likely due to damage of the hair cells. In my theory, the lining will burst either because it's been weakened (aspartame) or excessive pressure (when I've slacked on my workouts), or more often probably a little bit of both.

I'd love to get in contact with a doctor about it to explore the theory further, since I can definitely lay down some scientific method and observation, but my knowledge of the ear is probably pretty limited compared to that of an expert. Up until now, though, most doctors I've talked to seem to treat Meniere's as simply incurable and make no further time investments.

I just might try to reach out to this company and see if anybody there is interested even just give me a good reason my theory is wrong.