It is very important to stay hydrated whilst on a High Fat, High Protein diet. Drinking a good amount of fluids helps the body to "cleanse" the digestive system of excess fats and clear out carbs during the first 4 days.
I drink roughly 4-6L of water during the first 4 days then back off to about 2-4L after the initial 4 day period. I strictly drink water and refrain from using anything with sweeteners (ie Diet Sodas and Calorie restricted cordials), Sweeteners are connected to Sugar alcohols which fall under the Net Carb category. If I'm really craving for sweets I settle for one Pepsi Max only.
I find that if I don't maintain hydration levels, my hair and skin become quite oily.
Fluids on a Keto Diet
