There is no right or wrong and everyone is different.
I went keto was successful in losing around 20 LBS but then gained it all back as I went off of it.
I tried to go Keto for the past 3 months and it didn’t work out for me, I’m a weak willed cheater. So I went on the internet and started researching and found Dr Fung and other information sources about Fasting.
So for the past month my intention was to do extended fasting and eat Keto. But the way it turned out is that most days I fasted through the day and then at night I’d cheat with mostly low carb stuff under 500 calories and on the weekends I would eat normally one or two days. Yeah, High Carb.
What I’m doing now is translating into a more or less Alternate Day Fast combined with Fasting and Feasting. And it’s working. If it wasn’t or stopped working then I have to evaluate what I’m doing and make changes or tweaks.
If one does the right action then they will lose weight the trick is to figure out what is the correct action. There is just too much misinformation about diet.
If you base your diet on the foundation espoused by Dr Fung t teachings of Dr Fung that the cause of weight gain is hormones and the amount of insulin in the body and you are committed to trying different ways of dietary regemin to lower Insulin than you will lose weight. There is no one size fits all solution, he’s said that what he’d recommend for a morbidly obese person like me is totally different for someone with 10% or 20 too much weight.
By the way this is a great serieshttps://community.myfitnesspal.com/en/discussion/1108463/dr-jason-fung-on-why-diets-fail-in-the-long-run
Sometimes just a little tweak can have a major effect. Somewhere along the way the mainstream diet guys started recommending eating 5 or 6 small meals a day. Snacks etc… Well according to Dr Fung eating spikes insulin and by eating many meals you are keeping yourself in a constant state of elevated insulin.
He illustrates this with comparing our lifestyle to that of the 50s or 60s. We didn’t have so much obesity and it was accepted that you should eat 3 square meals a day with the last meal at around 6:00 PM. In the 50s-60s they didn’t have the obesity epidemic of today and they didn’t eat so healthy either.
So anyway, my suggestion is that if you aren’t losing weight investigate into hormonal causes and do what’s necessary to correct the hormonal issue.
But yes a person who is only a little overweight should not have the expectations of losing as much weight as a morbidly obese person. On the other hand if you are 25% + 50% overweight then if you aren’t losing weight at a rapid pace you are doing it wrong, or you should examine what you are doing and realize that unless you take more radical action you will not lose at a very fast rate.