I’ve heard that too but haven’t found it to be completely true personally. 

I was a person who would eat every ≈3 hours in my fiat days, though not junk food or anything. But I have a very fast metabolism and an active brain so I’d eat often and I’d eat a lot everyday. 

Since switching to carnivore and being very disciplined with the regimen I now typically eat twice a day, something like 1+ lb of ground beef plus eggs in the morning and 1.5 lb of steak for dinner. Interval of eating is way down but I do still get hungry during the day, though a lot less hungry than when I ate carbs and sugar regularly. And I can handle the hunger no issue, where before I’d feel weak or light headed even. 

I’m not sure I’ll ever get to that Valhalla stage of not being hungry while fasting. But I can fast now and do when I travel or when I’m busy and it’s no issue. Whereas before it was not even an option.