The bad taste is called ketosis ... its a high level of ketones in the blood .... usually caused by low carbohydrate diets .. its basically a high level of acids in the blood (i only know this because its common in diabetes) .. in laymans term, because you have no carbohydrate(or glucose) to break down in your body, it will break down your fat - this causes the level of acid in the blood to rise ..... your body will try its hardest to get rid of the acids by making you wee, itll come through in your breath as it enters your lungs to get rid ..... Just be suuuper careful, as your mimicing the atkins diet wen your eating such low carbs, its a fast way to loose weight but not good in the long term for your liver and kidneys xxxxxxx