Nobody, 1600 Cals/day sounds pretty reasonable to me, especially if Kayla is including 1-2 hours of exercise a day. And I gather >90% of her clients are women. Her brand is called "bikini body guide".
For weight loss, dietitians typically start women on 1200 Cals a day and men on 1500 Cals...though the overriding tailored priority is to create a 500-1000 Cal deficit per day. From what I've seen, Kayla's program generally complies with that. In fact, there's nothing revelatory about her package. It's probably one of the most bland I've seen. I presume her success is down to doing free public fitness boot camps around Adelaide, and getting a lot of exposure via the media....and she's been managed quite well by her boyfriend, family, minders, etc.
DR&F use the fact that most people don't keep weight off after a diet as proof the diet is starvation and damages the metabolism.
This is just simplistic bunk. The reason most people put the weight back on is because they go back to eating an unbalanced diet of excess.
The fact is habituating oneself to eating a cleaner diet often requires better stress management and positive lifestyle changes right across the board.
Re the 3000Cals, I've done a lit search on this topic, and tried to find out where DR&F got this idea from. They are not educated enough to have dreamed it up themselves. It appears Dr John McDougall is the culprit. He's popularized sayings like "The fat you eat is the fat you wear". And he teaches that people are very very inefficient at converting excess carbohydrate into fat stores, but rather carbs are burned off. And this is where I take issue with him. He has cited literature to back this claim, but he has been selective in doing so. What he is saying is that the de novo lipogenesis pathway (converts carbs into fat for storage) is very restricted. Now this is just not true. There are lots of studies that disagree with him. But he has never mentioned these studies in his writings or seminars. Why? because it would go against his whole 40 year old dietary philosophy - being that one should eat plant based and whole unprocessed carbs to satisfaction.
Anyway, health 'gurus' that followed McDougall like Doug Graham, have also just automatically picked up on and promoted the restricted DNL message...and I presume this is where DR&F heard it.
Now the truth is, a small % of people can overfeed and not put on any weight or less weight than predicted by Cals in/out, particularly when younger. The mechanisms for doing so are still being clarified. I've summarized the findings re this in a blog but won't bore you with it.
But the facts are that the majority of people who overfeed do indeed put on weight, and it isn't due to damaged metabolism. I told DR this many times in email correspondence and via his utube channel but he's too locked in to what works for him and a few others.
As for my progress Nobody, yes as Zill says, I should know better. What's also happened over the last 2 weeks is I've changed my lifestyle somewhat - cycling less, resting more, hanging with more refined people rather than a bunch of adrenalin driven cycling nuts, drinking tea sometimes rather than coffee all the time
Sometimes, a more genteel approach to life helps to get blood sugar back into equilibrium.