A very low calorie diet or ketosis will produce weight loss almost immediately. How could the health benefits precede the weight loss by months?
These arguments are completely divorced from reality. The standard American fat fuck Diet is not high carb, low fat. It’s high everything. So, if a fat fuck went on a low carb diet, he wouldn’t replace the carbs with fats he would lower both.
That's not true for many people. Many people, like the people in that one study, are very sick. They have diabetes and other medical conditions, some of them undiagnosed when they first start the diet. Many of them are on a ton of medications too.
Some medical conditions (diabetes, hypothyroidism, polycystic ovary syndrome, menopause, depression, Cushing syndrome, etc.) and some medications (diabetes medications, antidepressants, antipsychotics, corticosteroids, anti-seizure medications, etc.) will make it very difficult for these people to lose weight in the beginning even while in ketosis and even on a very low calorie diet.
Doctors have to tweak their diet and medications, run tests and in some cases diagnose and treat new medical conditions. There can be a period of trial and error when adjusting the diet and medications. Yes, this can take weeks to months before these people finally start to lose weight while in ketosis or on a very low calorie diet. In the meantime, these people have shown to get healthier and enjoy many of the benefits of nutritional ketosis before weight loss.
Then there are the other studies I linked where people were kept at maintenance calories to intentionally prevent weight loss. These people too got healthier on a keto diet independent of weight loss.
Over many years, many people who are already at their ideal body weight have gone on a ketogenic diet, not to lose weight, but to treat epilepsy, diabetes, prediabetes, insulin resistance, acid reflux (GERD), polycystic ovarian syndrome (PCOS), Hypertension, non-alcoholic fatty liver disease (NAFLD), irritable bowel syndrome, glycogen storage disease, traumatic brain injury, etc.. These people get healthier and enjoy the many benefits of a keto diet independent of weight loss.
Some people who are too skinny and malnourished, due to severe digestive issues, have gone on a very meat heavy keto or carnivore diet to gain weight. These people gain weight, get healthier, and enjoy many of the benefits of nutritional ketosis independent of weight loss.