I'm on 2nd day too and my stomach is rumbling and I'm genuinely hungry, which is why I've just logged on here to keep my mind off it. It will pass when you get into ketosis, but that's still a few days away. You will still lose weight on 4 products as you're only having 800 calories but it will take a little longer. By 'having to have 3 packs + a bar' do you mean because of the hunger?