During the first 3-5 days of strict carbohydrate avoidance (and not over-eating keto-friendly foods), you will notice a lot of water loss, especially in the morning.  Glycogen accumulates along with water in the body, so when glycogen is burned, water is released from the body.  Thus, you will lose a couple of pounds.   Although it is “just” the weight of water, it is still extra weight that you do not need to carry with you.  You may still consider it lost weight, and you may even notice that you feel less bloated and even slightly slimmer.  After that, weight loss will turn into a series of plateaus and small shifts. This process is rarely stable or sustainable, so just trust it.  It is best to lose 1 kg per week, but even 300 g per week is a success.  Electrolytes play a large role in the keto diet, as lost water carries away some of our minerals.  When there is little loss of electrolytes in the body, we can be grumpy, tired, lethargic, and have a headache or pain in our entire body. Also, many people experience cramps, especially in the legs and feet.  Electrolytes are sodium, potassium, magnesium, and calcium, and you need to add all four to your diet.  Sports drinks are full of sugar and contain only small amounts of these minerals, so they are best avoided.  Instead, focus on vegetables that are high in these minerals and be sure to add salt to your food to taste. Also, some people get constipated.  This is due to sudden changes in the diet - in particular, cheese can cause intestinal problems, so reduce the amount.  Be sure to include plenty of fiber-rich vegetables in your diet and drink plenty of water.