A low carb diet is the only lasting way to get back to your genetic weight. The caloric theory of weight loss is completely debunked, and if that is disputed, consider instead that the body wants ketones, not glucose, in the first place. You will always fail if you choose to use your pancreas as a carburetor burning sugar. Humans are diesels. Healthy fats made us lipivores, and we will never become adapted to carbage.