I am 81 years old. I have been eating a very low carb diet for about 17 years to control my form of reactive hypoglycemia (thriftygene.net (no ads, no promotion)). My diet is almost exclusively meat and low carb vegetables. My treats are nuts and backing chocolate (100% coca ). I do not lose weight on this diet. Most people do, my web site explains all. Women with my genetics get gestational diabetes.
I am 82 years old. I had an autoimmune event in 1957 (see thriftygene.net no ads, no promotion). I have reactive hypoglycemia. In 1964 I took a glucose tolerance test. The *** specialist said I was prediabetic. He was very wrong. My blood sugar is slowing down but rising for 2 hours. The reason I took the test was that a smart doctor noticed that all the symptoms me and my wife described would be explained as very low blood sugar. I looked at the result of the test and determined that I was getting my symptoms 3 ½ hours after eating too much sugar/starch/alcohol. I modified my diet but not enough. About 17 years ago I put myself on a very low carb diet with the normal amount of fat. I started to gain weight so I cut the fat in my diet to the point that I lost weight. I now eat too many nuts and my weight has stabilized. About 3 years ago I figured out what was happening and wrote the web site thrifygene.net. I advertise with google (after 3 people identified as google read my web site and saw that it all made sense) to health care professionals. The reason most people lose weight on a low carb diet is the following. They eat enough protein so the excess is changed into ammonia. The body releases insulin to change ammonia into urea. When the insulin enters the blood stream the body does not know that it is only supposed to change ammonia into urea. It starts to change sugar into fat. The body releases Human Placental Lactogen to make it self temporarily insulin resistant which prevents very low blood sugar. You end up with a lower blood sugar than the body is comfortable with so the liver changes fat into sugar. The reaction sugar into fat and then fat into sugar is very energy intensive. You lose up to 1/3 the energy available. You raise your metabolism and lose weight. People with my gene are usually insulin resistant. We do not change sugar into fat. We do not raise our metabolism. We do not lose weight.
--