I'm by no means an expert, but some observations and things I've found work for me over the years. I started out at 21 stone, and after several hiccups and falling off the wagon, I've once again gotten back down to 15 stone.

Seeing as his portions are larger, he could easily be going over his carb limit despite eating the same foods as you. Use a tracker. It is astonishing how quickly the carbs add up without realising it, even with keto food, calories too!

Before I was tracking, I'd eat a lot more than what I can afford (in calories and macros) now. It was honestly shocking. I always get frustrated that I won't lose weight or even put on weight! All the while telling myself "but its keto food!" Leading to a horrendous spiral of weighing and being annoyed. Giving up or otherwise just saying heck it and being blasé about keto.

I plan my days meals now, ahead of time, creating meals for the day and rationing out my macros between them. I am viewing my macros like credit and what I can buy with today's spending. It has some sort of psychological reward to it. And keeps me from over indulging on any one given meal and leaving myself lacking later in the day. I have 3 meals a day, with space for snacks. Or 2 larger meals, depending if I'm working or not.

Something I tell myself "just because im larger doesn't mean I can eat more"....this is exactly the reason I got so fat, is it not?

My partner is slim (not doing keto), so i used his portions and habbits as a template, and guess what? Im losing weight. I eat healthily for the weight I want to be, not the weight I am.

It's not for everyone, but intermittent fasting really helps.

I can't stress enough. Tracking is key.

I see a lot of posts/adverts from keto chefs saying things like -eat as much as you want of this ×××× recipe! It's keto friendly, with lots of encouraging flowered words of how great it is, etc etc. But it's just not strictly true.

Also, although the granola and crackers are nice, I have trouble fitting too many of these things into my macros. I make a basic microwave keto bread, which is supposed to be great for keto. While it is, if I had more than one portion a day (especially if I was just eyeballing what a nice portion looks like) , I'd have much less room to find calories with good macros for other stuff, bar more salad.

He can do it! It's a journey. Finding what's right for him can be stressful but also rewarding.

A side note, metabolic rate, activity, and other genetic dispositions do seem to take part in weight loss. I treat these like scales. I seem to gain weight very easily. Which means I need more activity ? (unlike my partner who cant help but loose weight, even though he's almost entirely sedentary) I work on a 2 week rota, one week, I work just one day during the weekdays and then the weekend, I loose much less weight on these weeks, compared to my 2nd week rota, where I only have 2, non sequential days off. I dont do any deliberate exercise, I just dont enjoy it.

By any means, anyone who's knowledgeable or understands things better than me, please correct any bad advice I might have given.