Fat definitely adds flavor to our foods, but too much also might add pounds and increase the risk of cancer or heart disease. Ketosis is good. Ketosis is the condition that results when diets are low in carbs. It is your body's way of adapting to starvation. When carbs are low, the body burns fat through ketosis, so it can use ketones in place of glucose in the brain.
Ketones suppress appetite and, if accumulated, can cause high uric acid levels.
Ketosis is a dangerous result of high protein diets. It can lead to gout, kidney stones or the nasty breath odor about which some protein dieters complain. The preliminary Atkins' diet is an example of a diet that does induce ketosis. But for most people, the most effective way to lose weight and keep it off still is through exercising and eating a diet based on whole grains and lots of fruits and vegetables. If you choose to increase your protein intake, be aware that too much protein could be harmful to your health.