I have PCOS/insulin resistance, so I’ve heard the “oh, sweeteners are the devil” thing a bunch, and I gotta tell you, for me they make NO DIFFERENCE. I lost 135 lbs in 14 months eating a ridiculous amount of aspertame and splenda: diet sodas, but also in my cottage cheese, in my coffee, in my tea, in my sugar free jelly etc. It might be worth trying–some people find it makes a difference–but don’t assume it will.
I did switch from diet soda to crystal-lite type powders about six months in because I was much thirstier and I found the non-carbonated stuff easier to drink in quantities, and I sorta lost my taste for carbonated sodas. I buy the generic powder and mix it in an empty gallon water jug–I use twice as much water as directed just because it does have SOME calories and once I got used to it, it tasted just the same (this took a couple weeks).
[rant]I think a lot of people think that anything that makes dieting easier is bad because being fat makes you a bad person and a diet is supposed to be punishment, so if instead you find a new way of eating that is actually enjoyable, it’s cheating. Instead, you are supposed to eat in a way that you don’t enjoy, but would if you weren’t a fatass, and if you find you don’t like a whatever diet, it must be that you are lazy and self-indulgent and the problem is all you. I spent YEARS trapped in this kind of thinking, and it was only when I realized it was all bullshit that I was able to safely and surprisingly easily control my weight.[/rant]