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In reply to the discussion: Sweden Becomes First Western Nation to Reject Low-fat Diet Dogma in Favor of LCHF [View all]supernova
(39,346 posts)calories and the way they behave in the body are not all created equal.
Switching to LCHF is switching your fundamental fuel source. In the SAD diet and in Low Fat, you derive your calories from the breakdown of digestion of all those carbs into glucose. It is fast acting and will peter out about four or five ours later. Many, many people respond to this over time by becoming insulin resistant, i.e. their bodies do not respond to insulin in the blood. You must eat again to make more glucose to have energy to walk, to study, to do a session at the gym, etc.
LCHF is different from low fat.
By not giving your body carbohydrates for glucose, you are forcing your body to switch over to another system for extracting an energy source, ketones from the breakdown of fat. People who are overweight will tap into their fat stores on their body: abdomen, thighs, arms, anywhere fat loves to park itself. That is why people lose weight on LCHF. You are tapping into a much longer-acting energy source. There are no sugar highs/crashes on LCHF as with low fat. You have a stable energy source for your entire day. You might feel like eating, you might not. People who do LCHF are not desperately hungry or experience cravings the way low fat and SAD dieters do. This isn't woo. You can measure your blood ketones, the rate at which you are making and using ketones, with a standard blood glucose meter that also measures ketones.