Hello, I'm new here, so not sure if my input is welcome yet or not but I have been "doing" Atkins for almost a year now and have lost 56 pounds so far. I couldn't give up my coffee or sweet tea (Iknow, I'm weak)but I did use Splenda to help with the taste. I use 3 pkts in every MUG of coffee ( about 6 a day) and 3 pkts in every glass of iced tea I drink (about a half to a whole gallon a day). I also drink some hot herbal teas from time to timeand will use 2 to 3 pkts then as well. So far I have only noticed that I am still losing weight and have no ill effects. So use your own judgement but dont do it at all if you aren't comfortable with it or notice ill effects. Good Luck either way!