I agree that artificial sweeteners are bad for you, as is refined sugar. Per Caryopteris, it's best to make water or unsweetened tea your drink of choice. If you don't like plain water, try flavoring it with fresh lemon juice.
If you have to have a sweetener, add stevia, which is a natural sweetener with no calories and doesn't spike blood sugar.
Water or unsweetened tea are best for weight loss. Fake sugars are terrible for you. I once saw a neurologist and that was the first thing out of her mouth, and I didn't even use them.