<p>Sometimes it’s best to apply common sense to these questions although it’s not always scientifically accurate. I’m often skeptical of ‘studies’ that draw conclusions one way or the other since invariably there are other studies that reach the opposite conclusions.</p>
<p>Ingesting too much caffeine (ex: 6-7 cokes or coffees a day although a cup of coffee has a lot more caffeine than a soda) has readily noticeable adverse physical effects including on the heart and on the ability to sleep, headaches (which means it has an effect on the brain). From my common sense perspective, this can’t be good for you. </p>
<p>Ingesting too much sugar (6-7 non-diet sodas) is also clearly not good for you as it can result in weight gain, metabolic disturbances, issues with the teeth, etc.</p>
<p>Ingesting too much of the ‘diet sugar substitute’ may not be good either. There are lots of studies reaching various conclusions but who knows?</p>
<p>I think the bottom line, as always, is ‘moderation’. I also don’t drink coffee or tea (I’ve never had a cup of either one and can’t stand even the smell of coffee) but I like Diet Mt Dew. I know if I were to drink 5 or so in a day I’d really notice the caffeine effects so I don’t do that. I purposely limit myself to 2-3 per day. I don’t drink it for the caffeine but rather the taste. I actually called up the company once and asked if they had non-caffeinated diet Mt Dew and they said they did but it wasn’t sold in my state. I know they’re changing the variations of the product all the time so hopefully they’ll come out with a non caffeinated version for me someday.</p>
<p>I think the bottom line in addition to the moderation point is that if you notice many effects from drinking or ceasing to drink something - it’s an issue. I’m willing to go out on a limb and state 6-8 cans of diet coke a day is way too much.</p>