@ianpspurs
I think the portion size thing is a bit of a red herring.
I mean, I look at some of the photos on here (thinking particularly about
@Rachox's beautifully presented pics) and the first thing I think is 'wot tiny portions!!!'.
But then I remember that Rachox eats 3 times a day, with dessert and often snacks.
In contrast, I eat probably twice a day, and my idea of a snack is a couple of squares of 70% choc.
If we piled all Rachox's food onto one plate, and all of mine on another, I wouldn't be surprised if she was eating more volume than me, but with the inclusion of her veg, and the fact that I am carni, and eating keto macros, mine is probably more nutrient dense.
(please correct me if you disagree with any of that speculation,
@Rachox !)
So basically, it boils down to horses for courses.
I am always highly amused by my husband's intake. He eats lowish carb, while I am carnivore.
So I put equal quantities of meat on both our plates, and then he adds about 1.5 x as much in veg on top of that. With cheese and butter. And so long as he doesn't add carbs, his weight stays the same, or drops.
For me, my weight stays the same unless I add carbs, in which case it rises.
As I say, each to their own.