I have been eating Atkins life style for a yr now and was using splenda and pink packet sweetners until I realized I was forgetting almost everything of normal routine stuff, and having extreme headaches daily, I thought I was going insane.  I decided to try stevita after reading some reveiws about stevia, I gradually started putting in half stevita and half pink packet, I don't ever recommend doing that, I ended up with a horrible reaction, the headaches went from pain to a numb tingly feeling to flu like symtoms then my urine became a floresent yellow that smelled 10ft away like a chemical, never try that again.  I have been using stevita now for 7mnths and love it, I put a packet in a cup of warm coconut milk with malt, thats my cheat treat from eating Atkins once a wk, lovely stuff and low carb.