You will still lose weight on them, but they are not natural foods. With a keto diet, the body becomes more efficient at using fat for energy because during that time it burns its own fat stores, which many people now want to take advantage of. It also decreases the strain on the digestive organs and decreases inflammation (as insulin and adenosine are both highly inflammatory and both are down-regulated with this diet). Research shows that along with reducing body weight, a keto diet reduced triglycerides levels, LDL cholesterol and blood glucose, while increasing HDL cholesterol. Laska says keto also helps reduce mood swings, brain fog and afternoon slumps and increases energy.