i didnt really know as i used the sticks that my counsellor gave me (she gave me 4 free of charge) but i did notice that i wasnt hungry at all when i was well into the ketosis fat burning stage, i've been on CD 3 weeks now and last saturday i had a tetra in the morning then didnt have my soup and shake until around 7 hours later (i was out of the house, not my normal eating pattern!) but i didnt feel hungry at all! ketosis is fab! x