Both part is potentially extremely complicated and difficult, actually. What if one hasn’t the vaguest idea what they NEED? I am sure most people doesn’t know or feel that… But at least most of us have some idea if we need some food… When, which kind and how much, that may be trivial or totally not…
And of course, carnivore may be impossible, hard, tricky, easy or natural, it’s very individual.
I know that but if my body wants its fuel, it never helps It’s awful to feel too tired to even walk… Okay, it happened this way once, way before carnivore and I was aware it’s too little food - but ONLY because I tracked. I ate until satiation, good food, I felt no hunger or other urge to eat at all. And then extremely low energy in the middle of my walk. Sure, my body had energy to be mostly okay for weeks but it is stubborn when it wants its stuff. I learn from these and realize what is my minimum calorie intake my body accepts if I can satiated with it and eat accordingly… Normally I don’t need to worry about eating too little but carnivore, especially with much meat (or not eating while nicely satiated) is too effective sometimes. And my body gets upset in 2 days and then chaos ensues. Nope, I will avoid that even if I need tracking for it. I wanna feel right all the time.
I would understand sweetness change if I wouldn’t eat sweet things… But I do. But well, sweetness change even for people who eat lots of sugar just not added sugar… It’s very interesting, actually. My high-carber SO with his 20 desserts per week (not counting the big amounts of fruits) needs his food just as sweet as me last year, after about 9 years on low-carb, we both changed A LOT. But I changed more recently. And these changes never disappear, no matter how we eat for a while.
I feel sweetness in most things since long but it surely will change more… Hopefully I won’t end up feeling everything sweet as that would be horrible. I need my normal food definitely not sweet! But there is no reason to feel items with zero or close to zero carbs too sweet even when it has some salt… So I don’t worry about that.