Definatley pepsi, but im off that now havent touched it for a month or so, other than that i just get weird cravings all the time! Last week it was mackerel and mushrooms (normal mushrooms), yesterday it was chicken noodles and this morning marmite, i looked at the ingerdients on the back of the marmite and one of them is nicotinic acid!!! nicotinic acid??? maybe thats a clue.