"I stayed on the diet for a few months, eating no carbs to low carbs. " First of all, you didn't do Atkins if you ate no carbs. You only had 20# to lose... you should have transitioned to OWL after the second week... and worked your way up to pre-maintenance very quickly after that. That would be around 60 grams of carb per day for the average person. At that point you wouldn't even be in ketosis anymore. So please, don't blame the Atkins diet for your current situation. You're probably feeling icky because you're not doing either diet right now... you're bouncing back and forth between low carb and high carb. Your body is trying to adjust and keep up and it's making you feel nasty. When you're low carbing your body produces enzymes necessary for fat metabolism... when you eat too many carbs and switch back to a glucose based metabolism you'll switch off the production of that enzyme... then go low carb again and your body can't instantly produce the needed enzyme to handle a protein/fat based diet. Do one or the other. Either read the Akins diet and follow as written... or go back to a glucose based diet (higher carb, lower fat). My stomach gets queasy if I neglect my veggie carbs... gotta have those. Hope this helps and that you're feeling better soon. Tril